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➤ ➤Subjects like maths, geography, Board exams may have been ➤ IPL match preview: Can STUDENT EDITION and chemistry can be interesting, if cancelled/postponed. But keep CSK's rein in presented in simple ways. Our TODAY’S solving sample papers, exclusively Punjab's formidable batting? FRIDAY, APRIL 16, 2021 Newspaper in experts tell us how Education EDITION prepared by your teachers PAGE 4 PAGE 2 PAGE 3 WEB EDITION

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FACTOID CRISTIANOCICSE says RONALDO review- $1.25 BILLION BECOMESing situation, FOOTBALL'S will The amount of inter-planetary dust that lands on the HIGHEST-GOALsoon decide SCORER on Earth every day, according to a new report. Rich in iron and nickel, the vast majority of these particles conducting class X, come from the passing comets and asteroids, and 14 TONS XII Board exams amount to more than 5,000 tons each year SIZE Each of these micrometeorites, as they're known, are hat's the loss that the Indian economy has to minuscule — from a bear per week, courtesy the surge in pandemic cases, which has forced many states to curb few tenths to he Council for the Indian School Certificate mobility and businesses, according to the British hundredths of a T T Examinations (CISCE) on brokerage Barclays. If the current restrictions remain in millimetre Wednesday said that it is review- place until May-end, the cumulative loss of economic and ing the Covid-19 situation and will commercial activity could be around $10.5 billion. soon take a decision on conduct- WHERE DO THEY ing the class X and XII Board ARE THEY A THREAT TO exams. The CICSE announcement Among all the major COME FROM? comes following the CBSE's deci- infection hotspots, OUR PLANET? sion to cancel class X exams and 2 the worst hit are Most extra-terrestrial postpone class XII papers, in view of the surge in Covid-19 cases. Mumbai and Pune  NO. Scientists are of the view that these particles do not particles burn up in our pose a threat to our world, rather they are of the view that atmosphere. While some understanding these particles can provide an insight into the The International Baccalaureate As regards primitive solar system that birthed them (IB) has decided to cancel the Maharashtra, which pass through as shooting board exams in India. Students, however, will be promoted, based Around 60 per cent 3 contributes to over 16 stars, a small amount To determine just how much of these parti- on a special assessment system of the economy is per cent to the national cles reach the Earth’s surface, nuclear 1 subject to mobility GDP, the mobility curbs put reach the ground as physicist Jean Durant led six expeditions restrictions now, the in place in the wake of ris- micrometeorites. Around over the last 20 years to the Franco-Italian report said, with key eco- ing cases, will take a dip in 80 per cent of microme- Concordia station in Antarctica, aka Dome C, nomic hubs of the gross value added to about 1,000 miles from the South Pole, and 680 IPL QUIZ Maharashtra, Gujarat, the growth by 0.32 % at teorites come from miles off the coast of Adélie Land. Dome C is an Tamil Nadu and Rajasthan, the national economy level ideal collection spot, as it has a near absence of comets, with the terrestrial dust witnessing rising cases this fiscal, a recent Care and falling mobility Ratings report said remainder from asteroids How many times has MS Dhoni been dismissed for zero Pets eased children's OLLY ALEXANDER'S SET TO RELEASE in IPL? HIS 'BEST' SONGS FOUR LONELINESS IN inger Olly Alexander, who was part of the band ‘Years & Years’ with Mikey Goldsworthy and Emre Recently, CSK MS Dhoni, S Turkmen, will soon be sharing some of his unre- while batting against Delhi MUSIC Capitals in IPL 2021, got out on lockdown: Study leased songs. He also wants to offer these to other the bowling of Avesh Khan for artistes, so that they can do something creative with zero. This was Dhoni’s fourth these songs. "Some of the songs, I never wanted to throw amily pets help children to Alexander just released duck in the history of IPL, and better manage the feelings them away, as they still are my babies and I still like parts first since IPL 2015. Harbhajan of stress and loneliness, of them. Maybe another artiste would listen and like it, the single ‘Starstruck’ as Singh (2015), Dirk Nannes (2010), which have been greatly and want to do something like their own thing, so I've his first project after and (2010), are the F kept a lot of them. "But, to be honest, the ones that are Petlife exacerbated by virtual schooling as a other bowlers to dismiss Dhoni the best ones, I'm going to put them out," he said. the band split result of the pandemic, shows a new for a duck survey. The Mars Petcare survey of par- ents reveals that more than eight in 10 parents found that their family pet New Zealand introduces climate change VARANASI TO BE KNOWN helped their child feel less lonely during AS SANSKRIT CITY the lockdown, with more than three- quarters feeling that day-to-day inter- law for financial firms in world first aranasi, the parliamentary con- stituency of Prime Minister actions with their cat or dog reduced New Zealand has become the first V Narendra Modi, will now be known their child's stress and anxiety. Parents VIEWPOINT country in the world to introduce a as the Sanskrit city in the world. Varanasi agreed that their pet supported their law that will require banks, insurers has the maximum number of Sanskrit child during the unprecedented break and investment managers to report schools as well as the highest number of from in-person schooling by improving the impacts of climate change on students studying Sanskrit. their mood, providing companionship There are more than 110 Sanskrit schools their business, minister for climate and giving them the much-needed emo- that are functional in Varanasi. change James Shaw said. tional support. NAMESAKE All banks with total assets of more than For many families navi- including having more ener-  NZ$1 billion ($703 million), insurers with more gating the stress and gy and improved concentra- According 1 than NZ$1 billion in total assets under man- challenges of home-school- tion, providing a fun topic of to UNICEF, at agement, and all equity and debt issuers list- ing, pets have offered chil- conversation to engage with least 1 in 7 chil- ed on the country’s stock exchange will have dren crucial support their classmates and teach- dren — or 332 million globally — has to make disclosures “We simply cannot get The survey also found ers, and giving them a lived under to net-zero carbon emissions by 2050 unless that pets positively much-needed break, away 2 nationwide stay-at- the financial sector knows what impact their impacted a child's experi- from the screen More than 97,000 students are studying home policies for at investments are having on the climate,” Shaw ence of virtual learning and This increased bond in these Sanskrit schools. In order to least nine months said in a statement “This law will bring cli- academic performance between children and The New Zealand government has introduced connect Sanskrit schools with 3 since the start of the mate risks and resilience into the heart of across all the ages — with their pets has many benefits several policies to lower emissions during its modern education, the computer educa- Covid-19 pandemic, financial and business decision-making,” he nine in 10 parents seeing for the pet too. Three-fourth second term, including promising to make its pub- tion and NCERT books are being provid- putting their mental added The bill requires financial firms to improvements in their believed their pet is also lic sector carbon-neutral by 2025, and buy only ed to students from classes VI to XII health and well- explain how they would manage climate-relat- child's emotional, social and calmer now, as they spend zero-emissions public transport buses from the being at risk ed risks and opportunities SHARE YOUR VIEWS AT core skill development, more time with their child middle of this decade Q Is it a good move? Should other countries follow suit? Share your views at [email protected] [email protected] The only way to learn mathematics is to do mathematics. MOCK PAPERS - Paul Halmos 02 FRIDAY, APRIL 16, 2021

GETGET ALLALL DUCKSDUCKS ININ AA ROWROW CLASS: X - 2020-21 SUBJECT: MATHEMATICS (CBSE) Maximum Marks: 80 BEFOREBEFORE MATHMATH EXAMEXAM Time Allowed: 3 Hours GENERAL INSTRUCTIONS PRACTICE PAPER SET BY ANITA SHEKHAR, DELHI PUBLIC SCHOOL, SECUNDERABAD 1. This question paper contains two parts A and B. a square base with depth 6 cm. Find the tangents PT and 2. Use of calculator is not permitted. side of a square. PS are drawn to a Q16. A number x is selected at random circle with centre PART A: from the numbers 1, 4, 9, 16 and another O such that ÐSPT  Section I has 16 questions of 1 mark number y is selected at random from the = 120°, Prove that each. number 1, 2, 3, 4. Find the probability OP = 2PS. ¾ that the value of xy is more then 16. Q27. Prove that is Ö5 an irrational num-  Section II has 4 questions on case ber. study. Each case study has 5 case-study (SECTION-II) Q28. Solve the following quadratic equa- based questions sub-parts. An examinee tion for x: 4x²– 4a²x + (a4 – b4) = 0. is to attempt any 4 out of 5 sub-parts. Case study based questions are com- Q29. In the given fig- pulsory. Attempt any four sub parts ure, the line segment PART B: of each question. Each subpart car- XY is parallel to the  Question No. 21 to 26 are Very short ries 1 mark. side AC of DABC and answer questions of 2 marks each. Q17. Case study based-1: it divides the triangle Mohan went to Airport two and half into two parts of equal areas.  Question No. 27 to 33 are Short hours before departure time. He observes Find the ratio of AX Answer Type questions of 3 marks each. that an aeroplane leaves an airport and AB  Question No. 34 to 36 are Long flies due north at a speed of 1000 km per Q30. The mean of the Answer Type questions of 5 marks each. hour. At the same time, he observes an- Based on the above situation, answer the (A) BC = CD + BD (B) BC = AC + CD following frequency other aeroplane leaves the same airport following questions. (C) CD = BC + AB (D) none of these distribution is 62.8. and flies due west at a speed of 1200 km (i) Find the number of books in each Q20. CaseStudybased-4: Find the missing fre- PART-A (SECTION-I) per hour.After de- stack. In a school, class XB and XC students ap- quency x. parture of two (A) 24 (B) 48 (C) 54 (D) 72 peared for Sunday sample paper test and Q1. Without actually performing the long aeroplanes, now (ii) Find the total number of stacks marks obtained out of 80 are formulat- Q31. A survey division, find if 987 will have he is rough sketch formed. ed in a table as follows: regarding the 10500 of drawing the (A) 7 (B) 10 (C) 14 (D) 16 heights (in cm) terminating or non-terminating (re- four directions (iii) How many stacks of mathematics of 52 girls of peating) decimal expansion. Give rea- along with aero- books will be formed? class-X of a sons for your answer. planes pictures (A) 7 (B) 8 (C) 9 (D) 10 school was con- Q2. If a and b are the zeroes of the poly- given below: (iv) If the thickness of each English book ducted and the following data was ob- nomial ax²+bx+c, find the value of a²+b². (i) What is the distance travelled by aero- is 3 cm, then the height of each stack of tained. Find the median height. Q3. What is the point of intersection of plane towards north after 1½ hours? English books is Q32. In the given fig- the graph of x + y - 2 =0 A) 1000 km B) 1200 km (A) 120cm (B) 124cm (C) 136cm (D) 144cm ure, APB and CQD a b C) 1500 km D) 1800km (v) If each Hindi book weighs1.5kg, then are semi-circles of with the x–axis and y–axis respectively? (ii) What is the distance travelled by aero- find the weight of books in a stack of (i) How many students secured less than diameter 7 cm each, Q4. For what value of k, the pair of equa- plane towards west after 1½ hours? Hindi books. 40 marks? while ARC and BSD tions 4x–3y=9, 2x+ky=11 has no solution? A) 1000 km B) 1200 km (A) 24kg (B) 48kg (C) 72kg (D) 96kg (A) 50 (B) 40 (C) 60 (D) 30 are semicircles of Q5. The angles of a triangle are in A.P., C) 1500 km D) 1800 km Q19. Case study based -3: (ii) What is the upperlimit of modal diameter 14 cm each. Find the perime- the least being half the greatest. Find (iii) ÐAOB is Four students A, B, C and D are visited a class? ter of the shaded region. the angles. ¾ ¾ A) 90° B) 45° C) 30° D) 60° Park on Sunday along with their Mathe- (A) 20 (B) 30 (C) 40 (D) 50 Q33. The horizontal distance between Q6. Find the roots of Ö2 x²+7x+5Ö2 =0 (iv) How far apart will be the two planes matics teacher. The teacher instructed (iii) The median class is: two pillars of different heights is 150 m. by factorisation. after¾ 1½¾¾ ¾hours?¾¾ ¾¾¾¾¾¾¾ all four students to attempt sample paper (A) 10-20 (B) 20-30 (C) 30-40 (D) 40-50 The angle of depression of the top of the Ö Ö Q7. Find the nature of the roots of 2x² – A) ¾22¾¾5¾0¾0¾0¾0 B) ¾3¾2¾4¾0¾0¾0¾0 test 06. They are sitting at the corners of (iv) The mean marks of the students is: first pillar when seen from the top of the 6x +3 = 0 C) Ö6250000 D) Ö5490000 a park, which is in the shape of a quadri- (A) 35.8 (B) 35.9 (C) 36 (D) 36.5 second pillar is 30°. If the height of the Q8. If TP and TQ are the two tangents to (v) The given problem is based on which lateral and started solving the test paper. (v) Class mark of the class preceding the first pillar is 60 m, find¾ the height of the a circle with centre O so that ÐPOQ =140° concept? modal class is: second pillar.(Use Ö3 =1.732] then what is the measurement of ÐPTQ. A) Triangles B) Trigonometry (A) 35 (B) 30 (C) 25 (D) 45 Q34. Draw the graphs of the following Q9. The length of the tangent from a C) Coordinate geometry D) Statistics system of linear equations on the same point A at a distance of 13 cm from the Q18. Case study based-2: PART-B graph paper: 2x – y = 1, x + 2y =13. Find centre of the circle is 12 cm. Find the Aditya works as a librarian in Bright the coordinates of the vertices of the tri- radius of the circle. Children International School in Indore. All questions are compulsory.In case angle formed by the two straight lines Q10. Areas of two similar triangles are He ordered for books on English, Hindi of internal choices, attempt any one. and the y – axis and the area enclosed by 36 cm² and 100 cm². If the length of a side and Mathematics. He received 96 Eng- Each question carries 2 marks. the triangle thus formed. of the larger triangle is 20 cm, then what lish books, 240 Hindi Books and 336 Math Q21. Find the zeroes of the quadratic Q35. A 1.2 m tall girl spots a balloon mov- is the length of the corresponding side books. He wishes to arrange these books polynomial p(x) = 4x² – 3x – 1 and verify ing with the wind in a horizontal line at of the smaller triangle? in stacks such that each stack consists the relationship between the zeroes and a height of 88.2 m from the ground. The Q11. To draw a pair of tangents to a cir- of the books on only one subject and the Please give answers to these questions. the coefficients. angle of elevation of the balloon from cle which are inclined at an angle of 60°. number of books in each stack is the (i) Write the coordinates of A and B. Q22. Prove that points (7, 10), (–2, 5) and the eyes of the girl at any instant is 60°. At which angle are the two radii inclined same. He also wishes to keep the num- (A) A(–3, 1), B (1, 4) (B) A(–3, 1), B(–1, 4) (3, –4) are the vertices of an isosceles After some time, the angle of elevation to each other, at the ends of which tan- ber of stacks minimum. (C) A(3, 1), B(–1, 4) (D) A(–3, –1), B(–1, 4) right triangle. reduces to 30°. Find the distance trav- gents are required to be drawn? (ii) Write the coordinates of C and D. Q23. A quadratic polynomial 2x²–3x+1 elled by¾ the balloon during the interval. Q12. If sec q + tan q = 7, then evaluate (A) C(–3, 2), D(1, 2) (B) C(–3, 2), D(1, 2) has zeros as a and b. Form a quadratic (Use Ö3 = 1.732] q - q. a b sec tan ¾ (C) C(3, 2), D(–1,–2) (D) C(3, 2), D(1,–2) polynomial whose zeros are 3 and 3 . Q36. Sushant has a vessel, of the form Q13. Given 2cos (3q)=Ö3 , find the value (iii) Distance of point A from the Q24. Draw a circle of radius 6 cm. From of an inverted cone, open at the top, of of q. origin is: a point 10 cm away from its centre, con- height 11 cm and radius of top as 2.5 cm Q14. What is the area of the circle that (A) Ö10 (B) Ö20 (C) Ö15 (D) Ö13 struct a pair of tangents. and is full of water. Metallic spherical can be inscribed in a square of side 6 cm? (iv) The distance from A to B is: Q25. Prove that (cosecA – sinA) balls each of diameter 0.5 cm are put in Q15. Two tanks are of the same capaci- (A) Ö15 (B) Ö13 (C) Ö7 (D) Ö5 1 the vessel due to which 2/5 th of the wa- ( secA – cosA)_ = ty.The dimensions of the first tank are (v) Which of the following may be true tan A+cot A ter in the vessel flows out. Find how 12 cm x 8 cm x 4 cm. The second tank has if B, C and D become collinear? Q26. In given figure, from a point P,two many balls were put in the vessel.

MOCK PAPER SUBJECT: PSYCHOLOGY (CBSE) CLASS XII BEBE POSITIVEPOSITIVE ININ PSYCHOLOGYPSYCHOLOGY MARKS: 70 PAPER SET BY TARANJIT DAVE, PGT PSYCHOLOGY, UDGAM SCHOOL, AHMEDABAD

SECTION-I many activities lately.She stays in ing cautious and protecting himself as effective as she would like to be. Heena's hardiness? [1] who has profound difficulty in re- bed most of the day,doesn't eat prop- from acquired immunodeficiency But she thinks it is really nothing iv. With this small amount of extra lating to other people. Often, he is Q1. Koh's block design test is an ex- erly and shows no interest in inter- disease syndrome (AIDS). He re- to worry about. time, Heena makes self-care a pri- found to be unresponsive to other ample of ______test of intel- acting with her family or friends. If alises that his fear is irrational but One day, however, she receives ority and begins exercising and people's feelings and exhibits stereo- ligence. [1] these symptoms continue for more is unable to control it. The patient a phone call at work to find out that meditation regularly. Identify the typical patterns of behaviour.Iden- Q2. Children with high ______than 2-3 weeks, she will be at risk of has fainted twice in the past when her father has had a stroke. Initial- coping strategy used by Heena. [1] tify this disorder and describe its self-esteem are more liked by their being diagnosed with ______. [1] his blood was drawn during a phys- ly,Heena takes it in stride and tells features. [4] peers. [1] Q11. Whenever Raj walks out of his ical examination. He becomes ex- herself 'everything will be fine.' Af- SECTION-III Q27. Prisha has been feeling anx- Q3. Worries and stress can mani- office feeling stressed, he goes out ter three months of physical thera- ious and depressed. She is con- fest as frightening, painful sensa- drinking with his friends that py in a long-term care unit, Heena Q17. Discuss the main limitation of vinced that no one loves her tion which could be mistaken for evening. He would feel a bit relaxed decides that her father will have to Hans Selye's model of stress. [2] and that it would be very dif- heart attack. (T/F) [1] after having drunk, and hence, this come and live with her and her fam- Q18. Nisha is experiencing gener- ficult for her to succeed. Q4. Which of the following is true behaviour became a pattern with ily,so she can help care for him dai- alised anxiety disorder.Enumerate How will Beck's cognitive of depression? [1] him. Over time, he developed the ly. any two causes with reference to therapy help her deal with a) It affects men more frequently habit of taking to alcohol on facing She notices that she is not sleep- diathesis stress model which may her negative thoughts? [4] than women. even a minute stressor in his life, as ing well. One day at work, she un- have led to the disorder. [2] Q28. Your friend eats too b) It is a component of Disso- alcohol was something that helped intentionally makes a critical mis- Q19. What is separation anxiety dis- much junk food. How ciative Identity Disorder. him relax. The antecedent factor in take and gives a patient the wrong order? List any two symptoms. [2] would you be able to bring c) It is caused by low activi- Raj's life is ______and the main- medication. She decides she needs Q20. Elucidate any 2 techniques to about a change in her/his ty of serotonin. taining factor is ______. [1] help to care for her father and hires help you deal with exam stress. [2] attitude towards food using d) It is more prevalent Q12. The ______mode of message an agency that provides home vis- Q21. Enumerate any 4 character- concept of balance? [4] among the wealthy than transmission is more effective in its to take care of her father four istics of a group. [2] Q29. Your class has been allocat- the poor. bringing about an attitude change. times a week. Q22. What are the ethical consid- ed the responsibility of putting up Q5. The Vietnam war which led to [1] With this small amount of ex- erations that need to be followed by a cultural show for the special as- the loss of many American and Viet- Q13. Learning alphabets and dig- tra time, Heena makes self-care a psychotherapists? [2] sembly in which you have to show- namese lives, is an example of its is an example of simultaneous tremely anxious at the sight of a priority and begins exercising and case about 5-6 performances. De- ______. [1] processing. (T/F) [1] needle and worries for days before meditation regularly.After a short SECTION-IV scribe the stages of group forma- Q6. The Nazis committed atrocities Q14. Rohit recently got a heart at- an appointment with his physician time, Heena begins to feel more like tion that your classmates will go against the Jews. This is an exam- tack. Rohit's wife reported that he or dentist. herself and finds that she responds Q23. Anu is a good dancer who is through. [4] ple of ______. [1] is high on motivation and a go get- I. Identify Yash's disorder. [1] to the stress in a more productive well adjusted in school as she co- Q7. Dr. Joshi, a Neurosurgeon, ter. However, the downside is that II. Name the category of this dis- way.She begins to have a better re- operates with her teachers and class- SECTION-VI would be high on ______intelligence, he is always in a hurry, lacks pa- order. [1] lationship with her father and fam- mates in all school related activi- according to Howard Gardner. [1] tience and feels burdened with work. III. Name the other sub types of this ily and is regaining her confidence ties. She is also liked by friends and Q30. Elaborate the theories based Q8. Mr.Bakshi lost his wife recently Rohit would be categorised as hav- category of disorder. [1] at work as well. family.Identify and explain the types on psychometric approach. [6] due to pandemic. However, every ing ______personality type. [1] Q16. Read the case and answer the i. What was the source of Heena's of intelligences that Anu is ex- Q31. Disccuss Freudian 5-stage the- single day he calls her on the mo- questions that follow: [1x4=4] stress? [1] hibiting. [3] ory of personality development.[6] bile hoping for her to answer his SECTION-II Heena is a registered nurse in a busy ii. She notices that she is not sleep- Q24. Explain Allport's Trait Theo- call. He is in the ______phase of ego emergency room. She deals with life ing as well. One day at work, she un- ry. [3] These questions are meant for practice defence mechanism. [1] Q15. Read the case and answer the and death situations regularly at intentionally makes a critical mis- Q25. Explain the concept of cogni- purpose only. Students are advised to check for- Q9. Shivam is being provided with questions that follow: [1x3=3] work without missing a beat. She take and gives a patient the wrong tive dissonance with example. [3] mat, syllabus and marks for Board test papers books and uniforms by the school. A 27-year-old, Yash, an athletic finds that if she does not take time medication. Which stage of the Gen- with their teachers. Questions have been given He is receiving ______kind of young man, has an intense fear of out occasionally for herself by ex- eral Adaptation Syndrome model SECTION-V by teachers and NIE is not responsible for them. support. 1 needles. He tries to rationalize his ercising and spending time with her was Heena in? [1] Photos taken for illustrative purpose only. Q10. Sanjana doesn't seem to enjoy fear by explaining that he is just be- family and friends, she is not quite iii. Which set of words best describe Q26. Sheldon is an eight year old CLICK HERE: PAGE 3 AND 4

“A man who carries a cat by the tail learns A2Z OF CONCEPTS something he can learn in no other way.” – Mark Twain FRIDAY, APRIL 16, 2021 03

Beginning the journey TEACHERS, IF YOU of learning in an HAVE A CONCEPT THAT CAN alphabetical order, Times CHANGE A NIE takes you through CLASSROOM, SHARE IT ON one concept from each [email protected] WITH subject every fortnight YOUR PHOTOGRAPH CLASSROOMS TO EXPERIENCE ZONES ACTIVITIES TO TEACH EQUINOX SUN EXPERIMENT GEOGRAPHY MAKE YOUR OWN CALENDAR What to Do EQUINOX 1. To create changeable circles, Glue the wooden stick to the card- have students fold a piece of 1 board square so that it stands up- n equinox oc- right (as shown in the sketch). To curs when the paper into four sections. With a assure that the full shadow fits on A position of the colour pencil and a compass, the cardboard, you may want to Sun is exactly over the draw four circles large enough glue the stick closer to one of the equator. When this to fill each section. edges. happens, the hours of everywhere on the Earth. Equinoxes Once the glue is dried and the daylight and the hours take place twice a year. 2. Students fold another piece of 2 stick can stand by itself, place the Discuss your observations with of darkness are about Autumn, or Fall, begins with the au- paper and divide it into four cardboard square on a flat sur- 5 your family. Ask them if they equal almost tumnal equinox. After the autumnal sections. To create windows, face where it will be exposed to think that there are any days equinox, the days become shorter and draw a rectangle in each section near an outer edge. the Sun. Take note of the time of where the shadow will appear in The equinoxes are times of celebra- the nights are longer. The autumnal day.Mark the point on the board the same place at the same exact equinox occurs around September 23 Make three large openings (month, season and day) and where the tip of shadow is locat- time. tion for many cultures. The autumnal in the Northern Hemisphere and a fourth a little smaller (date). Cut out the openings. ed and write the date. equinox happens at a time when crops around March 21 in the Southern Hemi- 3. Students decorate each section with pictures. It is important that the board be Learning Outcome are ready for harvest. In the Zoroastrian sphere. oriented in the same direction 4. Students create moveable wheels by placing each circle 3 culture, it marks the beginning of the new year, The vernal equinox marks the be- each time you lay it on the ■ The only two days where the Sun’s Nowruz. Each year, on September 22/23, the ginning of spring. After the vernal equi- behind a section so that a small portion sticks out slight- ground. You might mark one of location matches at any time are nox, the days become longer and the Druids and Pagans gather at Stonehenge in the ly beyond the edge. Hold in place with paper fasteners. the edges of the cardboard square March 21 (vernal equinox) and nights become shorter.The vernal equi- 5. They write January in one opening. Turn wheel so it can as a point of orientation. September 21 (autumnal equinox). morning to mark the spring equinox and to see nox occurs around March 21 in the Repeat this daily or weekly at the ■ The only place on the Earth where the sunrise above the stones. Northern Hemisphere and around Sep- no longer be seen, then write February. Continue through 4 exact same time each day. Tabu- the Sun’s location matches every day tember 23 in the Southern Hemisphere. the rest of the months and other boxes (date and days). late the observations. is on the equator.

Dozenal LANGUAGE It is an interesting number system MATHS with 12 digits - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B. B is 11 ones (units) - 11 is the maxi- Let us see conversion of a decimal Let us convert a decimal (24) to octal. mum possible quantity that can be into binary. shown using a digit. Division Converting 1310 (that is 13 in decimal) Step Quotient Remainder to binary – by 8 1 24/8 3 0 When we show 1 thing more Division 2 0 3 Step Quotient Remainder 3/8 than 11, that one more thing by 2 becomes 1 twelve and is writ- 1 0 1 13/2 6 1 2410 = 308 (3 x 8 + 0 x 8 ) ten as 10. 10 is 0 ones and 1 twelves (1 x 12). 2 6/2 3 0 QUINARY 12 Block EXTENDED NUMBER SYSTEM 3 3/2 1 1 110 is 0 ones, 1 twelves and 1 EUPHEMISM 5 digits, 0 – 4 are used to represent all one-forty- By Sandeep Srivastava 4 1/2 0 1 By Kartik Bajoria quantities. fours (0 x 1 + Educator since 20 yrs, he The ‘Remainder’ cannot be anything 4 is 4 ones (units) – 4 is the maxi- 1 x 12 + 1 x 12 Jaipur-based specialises in making Maths other than 0 and 1 – the permissible mum possible quantity that can be x 12) Communication Skills easy and fun digits in binary system. Thus, we shown using a digit. Educator & Writer keep dividing the given quantity ABA is 10 144 Block 12 Block (1310) by 2 (binary system) to express ones, 11 twelves, and 10 one it using 0 and 1 only. forty ]fours (10 x 1 + 11 x 12 + 10 x 12 x 3 2 he decimal number system is only unique in that 1310 = 11012 (1x2 + 1x2 + When we show 1 thing 12) nglish is a beautiful language that gives it has 10 unique digits, 0 – 9. We use many num- 0x21 + 1x20) more than 4, that one more us the inherent opportunity to be polite T ber systems such as, 0 – 6 for weekdays, 0 – 11 for thing becomes 1 five and is Eand sophisticated. There are many situ- dozen, 0 – 59 for second/minute, besides 0 – 1 for binary Octal written as 10. ations in life wherein it would seem inappro- for computers. Knowledge of these (Extended) number 10 is 0 ones and 1 fives (1 x 144 Block 144 Block 144 Block 144 Block priate and rude to describe a situation as it is. systems, helps us better appreciate decimals. Let’s 0 – 7 are used to represent all 5) – 5 ones don’t exist, it’s For instance, when a person has died. Or briefly learn some other number systems, which follow quantities. written as 1 five and 0 5 Block when a person has been sacked from their job. the same logic as decimals. 10 is 0 ones and 1 eights (1x8) 8 Block ones. This is when euphemisms can assist us great- – 8 ones does not exist. 144 Block 144 Block 144 Block 144 Block ly in relieving some of that blunt edge that the BINARY news innately carries with it. 11 is 1 ones and 1 For example, if one had to say a few words Only two digits – 0 and 1 – can be used to represent all fives (1 x 1 + 1 x 5) at a funeral meeting, rather than saying the quantities. 101 is 1 ones, 0 144 Block 144 Block 12 Block 12 Block 12 Block 12 Block 12 Block 12 Block word ‘died’, you could use euphemisms such as eights and 1 5 Block 1 Block departed or passed away.There is also an aspect 10 is 0 ones and 1 twos, shown as sixty-fours of being politically correct that a euphemism (0 x 1 + 0 x 8 + 211 is 1 ones, 1 fives, and 2 twenty- helps us with. For instance, rather than calling 11 is – 1 x 8 x 8) 64 Block 1 Block fives (1 x 1 + 1 x 5 + 2 x 5 x 5) someone ‘fat’, which may be interpreted as body Let 12 Block 12 Block 12 Block 12 Block 12 Block shaming in the modern era, one could use ‘big- 1 Block 1 Block 1 Block 1 Block 1 Block 1 Block 1 Block 1 Block 1 Block 1 Block boned’. Similarly,rather than calling someone 100 is 1 x 2 x 2; just as 111 is 1 ones, 1 eights and 1 sixty – ‘old’ outright, ‘getting on’ sounds more appro- 100 in decimal is 1 x 10 x 10. fours (1 x 1 + 1 x 8 + 1 x 8 x 8) Let us convert 10010to a dozenal num- priate. Therefore, a euphemism can be a single ber. word or a phrase. All these terms and expres- 25 Block 25 Block 5 Block 1 Block Division Step Quotient Remainder sions make the language more agreeable and by 12 make for a polite society and people. Let us understand how to convert 100 in decimal system to a quinary 1 100/12 8 4 10101011 is 1 ones, 1 twos, 0 fours, 1 eights, 0 sixteens, number. 2 8/12 0 8 1 thirty-twos, 0 sixty-fours and 1 one-hundred-twenty- 64 Block 8 Block 1 Block eights. 311 is Division 100 = 84 Step Quotient Remainder 10 12 by 5

1 100/5 20 0 Next, we will discuss Fraction for F, 2 20/5 4 0 the more common form of numbers. 3 4/5 0 4

64 Block 64 Block 64 Block 8 Block 1 Block If you have queries for Professor Srivasatava, 128 Block 32 Block 8 Block 2 Block 1 Unit write to us on [email protected] 10010 = 4005

EXPERIMENT THIS whole water is absorbed by the Results Of Efflorescence Test We generally see effervescence specimen and the surplus water will Results of efflorescence test shall CHEMISTRY while opening a cold-drink bottle get evaporated. be reported as nil, slight, moder- after shaking it. Similarly, this Cover the dish containing brick with suitable glass cylinder so that ate, heavy or serious. EFFERVESCENCE AND there will not excessive evaporation EFFLORESCENCE from dish. bricks. Usually magnesium sul- When whole water get absorbed some small bowls with 1/2 cup of phate, calcium sulphate and car- and brick appears to be dry,place a vinegar with a few drops of food bonate of sodium and potassium similar quantity of water in the dish colouring and a dropper is all that are found in efflorescence. The and allow it to evaporate as before. experiment will show effervescence you need. movement of groundwater into the After this process, examine the with erupting colored volcanoes due As soon as the coloured vinegar foundations of buildings and by cap- bricks for efflorescence and report to a reaction by using an acid, base, touches the baking soda a fizzy chem- illary action into brickwork is very results. water colours and dishwashing ical reaction occurs. Colourful bub- often the cause of efflorescence. liquid. bles begin appearing immediately Here is an easy,fizzy science ex- once the powder and liquid make EXPERIMENT THIS periment for kids that requires only contact. The colours mix together a few commonly found household really easily to create new colours. Fill distilled water in shallow dish ingredients. This science experi- and place one end of brick in dish. ment, which uses baking soda and Efflorescence is the process of Water should fill in dish such that vinegar, teaches children about losing the water of hydration from bricks should immersed in water up ffervescence is the foaming formed chemical reactions. a hydrate compound. to 25 mm depth. as a result of a gas being evolved A baking dish with a layer of Efflorescence is a whitish crys- Place this whole arrangement Efrom a solid or liquid. baking soda (or baking powder), talline deposit on surface of the in a warm ventilated room such that In CSK’s opening match against Dhoni batted for just two balls before he was cleaned up would by Avesh Khan. The former India skipper looked to look for inspiration from play a pull shot, but only managed to get an inside skipper Mahendra Singh edge back onto the stumps Dhoni and a much-improved bowling effort when they take on a power-packed Punjab Kings in the IPL in Mumbai on Friday

CSK eye improved (54), Moeen Ali (36), Sam Curran (34), Ravin- went for big runs and looked rusty. Come ➨ Opening the batting, KL Rahul played a cap- won’t be a happy man with the perform- dra Jadeja (26) and Ambati Rayudu (23). Friday, the onus would be on master tacti- tain’s knock of 91 off just 50 balls. He was ances of his bowlers. cian Dhoni to inspire his teammates to lift ably supported by big-hitting bowling effort ➨ Despite failures from the opening duo of ➨ Young Arshdeep Singh (3/35) eventually their performance and give Punjab a run (40 off 28) and Deepak Hooda (64 off 28). ➨ The two sides experienced contrasting for- Rituraj Gaikwad and Faf du Plessis besides for their money. emerged as Punjab’s saviour. Needing 13 skipper Dhoni, CSK managed to put up a ➨ runs off the last over, the left-arm pacer tunes in their respective tournament open- ➨ For Punjab Kings and Rahul, batting is not er.While CSK lost by seven against decent total on the board. But for that to happen, the CSK skipper him- at an area of concern as they showed with gave away just eight runs to pull off a fine self needs to lead from the front after fail- win for his team. Delhi Capitals, Punjab Kings eked out a four- ➨ But the Chennai outfit’s bowling unit looked their performance in the opener, but just like run win over Rajasthan Royals in a high- ing to score against DC. CSK, the bowling unit remains a major wor- completely out of sorts and clueless against ➨ Besides Arshdeep, veteran Mohammad Sha- scoring thriller. ry despite spending big money at the auction. the DC opening duo of and Question mark on Punjab’s mi (2/33) too had a decent outting with the ➨ With the dew playing a crucial role at , who were ominous from the ➨ RR skipper Sanju Samson almost single- ball but the performance of Australian pace word go and stitched a 138-run stand to take Wankhede, the side winning the toss would overseas pacers handedly took the game away from Punjab duo of Jhye Richardson (1/55) and Riley the game away from CSK. Meredith (1/49) should be a concern for want to bowl first. In their first match here, ➨ Punjab Kings, on the other hand, had a nar- Kings with his whirlwind 63-ball 119-run Punjab, having shelled out `22 crore for CSK posted a competitive 188 for seven, rid- ➨ The likes of Deepak Chahar, Sam Curran, row escape against RR despite posting a knock in their opener, but fell short just by their services. ing on fine contributions from Suresh Raina Shardul Thakur,Jadeja and Moeen Ali all mammoth 221 for 6 on the board. four runs in the end. And Rahul definitely

Photo: PTI VERY BITTER PILL TO SWALLOW: WARNER

When it rains, it pours. The adage holds true for Glenn Maxwell who is on a run-making spree in this edition of unRisers Hyderabad (SRH) the (IPL) after less than average performances with the bat over the last few years skipper David Warner was S deeply hurt after his side lost to Royal Challengers Ban- galore (RCB) from a winning lenn Maxwell, who scored his there is pressure on me to turn up and position. Warner’s half-cen- first IPL half-century on I think Maxwell’s innings was the dif- make an impact,” added Maxwell. ference for us. It’s about getting tury had put SRH in the dri- Wednesday after three barren ver’s seat but Shahbaz Gseasons, is relishing a new- momentum in the first six overs, but In the 2020 season, Ahmed ran through their found form and confidence with his new for us Maxi (Glenn Maxwell) gave us that middle order to help RCB franchise, Royal Challangers Bangalore momentum and got us closer to 150 Maxwell couldn’t hit register a thrilling six-run that has pushed him into a role (against SRH). a single six win at the MA Chidamb- he plays for Australia. Virat Kohli, RCB captain In the first match, his 39 played a key aram Stadium. The SRH role in helping RCB win. In his second skipper feels his side needs a ‘Kohli’s match of the season, Maxwell top- big partnership in the mid- “It’s a very nice start, a new fran- dle overs to get over the line. good at chise for me and they have given me a scored for RCB with 59 off 41 balls. While he hit two sixes in the tourna- “It was just about building keeping specific role.To start like this is really a partnership and I was The last time Maxwell nice. It’s nice to have batters behind ment opener against Mumbai Indians, me on task’ he hit three sixes on Wednesday night. quite disappointed with how hit a half-century you, you have freedom with AB to come we went, cross-batted shots Maxwell, who aggregated just 108 In the 2020 season, he couldn’t hit a was back in 2016. and it’s a very similar role I have in the against left-arm orthodox. It in 13 matches at an average of just single six. Since then, his high- Australian team,” said Maxwell, just hurts,” Warner said. “We David over 15 in IPL 2020 and was there- The last time Maxwell hit a half-cen- est had been 47 each who was awarded Man of the Match for have another three games he- Warner fore released by the Punjab fran- tury was back in 2016. Since then, his in 2017 and 2018 and his 41-ball 59. re, the wickets are going to get chise ahead of this season, has been highest had been 47 each in 2017 and “Kohli’s good at keeping me on task. better.We need powerplay wick- 32 in 2020. He didn’t pushed up to the No. 4 batting slot Having those guys behind me is a nice 2018 and 32 in 2020. He didn’t play the ets and have one big partnership play the 2019 edition this season by RCB. little luxury. It’s my fourth IPL team and 2019 edition. in the middle," he added. ANI

Photo: PTI Photo: ANI

a) New Zealand in Aus ❑ b) Eng in Sri Lanka ❑ How many wickets has Kyle Edmund won the New c) Ravindra Jadeja ❑ d) R Ashwin ❑ c) West Indies in Eng ❑ d) Pakistan in Eng ❑ Q6: Mohammed Shami taken Q7: York Open 2020. Who did QUIZ TIME! in ODIs? he beat in the final? Which Indian Grand a) 178 ❑ b) 156 ❑ c) 134 ❑ d) 148 ❑ a) John Isner ❑ b) Milos Roanic ❑ Q10: Master recently won the In 2011, David Warner made Golfer Miguel Angel Q1: c) Andreas Seppi ❑ d) Rafael Nadal ❑ Cannes Open Chess Tournament? his Test debut against which Q4: Jimenez broke the Photo: GETTY IMAGES a) Praggnanandhaa ❑ b) D. Gukesh ❑ country? European Tour record for most c) Harshavardhan ❑ d) Sasi Kiran ❑ a) South Africa ❑ b) India ❑ Which player was the career starts. Who was the Q8: most expensive Premier c) England ❑ d) New Zealand ❑ Who is the first super previous record holder? League import in the summer of Q11: heavyweight (+91kg) Indian a) Seve Ballesteros ❑ b) Sam Torrance ❑ 2020? Which player has made the boxer to qualify for the Olympic c) Bernhard Langer ❑ d) Barry Lane ❑ a) Kai Havertz ❑ b) Thomas Partey ❑ Q2: most football Premier Games? c) Timo Werner ❑ d) Lionel Messi ❑ ❑ ❑ League appearances? a) Amit Panghal b) Sakshi Chaudhary ❑ ❑ ❑ ❑ Name the para athlete who c) Manish Kaushik d) Satish Kumar a) Ryan Giggs b) Frank Lampard Who has been named as ❑ ❑ Q5: won the Rajiv Gandhi Khel c) David James d) Gareth Barry Q9: ‘India’s Most Valuable ANSWERS: 1. d New Zealand 2. d. Gareth Barry Ratna Award in the recently announced Test Player of the 21st Century’ 3. c West Indies in Eng 4. b. Sam Torrance National Sports Awards 2020? 5. d. Mariyappan T 6. d. 148 7. c. Andreas Seppi Which was the first by Wisden? Q3: a) Rani ❑ b) Devendra Jhajharia ❑ 8. a. Kai Havertz 9. c. Ravindra Jadeja International cricket a) Mahendra Singh Dhoni ❑ b) Virat Kohli ❑ 10. b. D Gukesh 11. d. Satish Kumar tournament played in the bio-bubble? c) Purushotham Rai ❑ d) Mariyappan T ❑ Mohammed Shami