Key-Stage IV (Classes IX and X)
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Self-Instructional Materials Key-stage IV (Classes IX and X) Published by Ministry of Education in collaboration with Royal Education Council Copyright © Ministry of Education, Bhutan Advisors 1. Karma Tshering, Officiating Secretary, Ministry of Education 2. Kinga Dakpa, Director General, Royal Education Council 3. Phuntsho Lhamo, Education Specialist, Advisor to Department of School Education, MoE Developers 1. Kinzang Wangchuk, Principal, Laptsakha PS, Punakha (Key-stage Facilitator) 2. Kelzang Lhadon, School Lead Teacher, Shari HSS, Paro (Key-stage Facilitator) 3. Jamyang Drukda, Teacher, Punakha CS, Punakha (Key-stage Facilitator) 4. Samdrup Tshering, Teacher, Lamgong MSS, Paro (Dzongkha) 5. Kezang Wangmo, Teacher, Daga CS, Dagana (English) 6. Chimmi Yangdon, Teacher, Changangkha MSS, Thimphu (English) 7. Pratima Rai, Teacher, Khangkhu MSS, Paro (English) 8. Phurpa Gyeltshen, Teacher, Zilukha MSS, Thimphu (Mathematics) 9. Chhimi Lhadon, Teacher, Changangkha MSS, Thimphu (Social Science – Geography) 10. Kuenzang Wangchuk, Teacher, Nobding LSS, Wangdue (Social Science – Geography) 11. Ngawang Drakpa, Zilukha MSS, Thimphu (Social Science – History) 12. Leki Wangmo, Teacher, Mendrelgang CS, Tsirang (Science – Chemistry) 13. Tshering Zangmo, Teacher, Changangkha MSS, Thimphu (Science – Chemistry) 14. Nima Tshering, Teacher, Lhuentse HSS, Lhuentse (Science – Biology) 15. Tashi Dorji, Teacher, Sonamthang CS, Zhemgang (Science – Physics) Content Editors 1. Tsheringla, Principal, Daga CS, Dagana (English) 2. Kelzang Lhadon, School Lead Teacher, Shari HSS, Paro (English) 3. Pratima Rai, Teacher, Khangkhu MSS, Paro (English) 4. Sonam Zangmo, Teacher, Sonamgang MSS, Phunthsoling Thromde (Dzongkha) 5. Dechen Pelden, Teacher, Lhuentse HSS, Lhuentse, (Mathematics) 6. Sumitra Subba, Teacher, Shari HSS, Paro (Physics & Chemistry) 7. Sonam Zangmo, Cluster Lead Teacher, Samtse HSS, Samtse (Biology) 8. Tshering Lham, Shari HSS, Paro (Biology) 9. Bodpa Nidup, Teacher, Jigme Sherubling CS, Trashigang (Geography) 10. Tshering Namgyel, Lhuentse HSS, Lhuentse (History) Layout and Design 1. Jamyang Drukda, Teacher, Punakha CS, Punakha Cover Design 1. Samdrup Tshering, Teacher, Lamgong MSS, Paro Overall Coordinator 1. Phuntsho Lhamo, Education Specialist, Advisor to Department of School Education, MoE TABLE OF CONTENTS English: Present Tense ..............................................................................................................4 English: Past Tense ................................................................................................................. 15 English: Future Tense ............................................................................................................. 24 English: Letter Writing ........................................................................................................... 33 English: Types of Sentences .................................................................................................... 38 English: Figures of Speech ...................................................................................................... 42 English: Direct and Indirect Speech ....................................................................................... 49 English: How to Approach a Novel ........................................................................................ 58 Biology: Hormones .................................................................................................................. 63 Biology: Ecosystem.................................................................................................................. 72 Chemistry: Chemical Bond ..................................................................................................... 78 Physics: The Electromagnetic Waves ..................................................................................... 86 Mathematics: Data Involving Two Variables ........................................................................ 95 Mathematics: Linear Inequalities......................................................................................... 110 Mathematics: 2-D Efficiency and 3-D Efficiency ................................................................. 119 Mathematics: Simple and Compound Interest .................................................................... 126 Mathematics: Probability ..................................................................................................... 135 Mathematics: Linear Functions and Relations .................................................................... 145 Mathematics: Making Purchasing Decisions & Taxation ................................................... 156 Geography: Factors Affecting Climate of Bhutan ............................................................... 166 Geography: Hazards ............................................................................................................. 175 Geography: Gross National Happiness ................................................................................ 182 History: Branches of Government – Part II......................................................................... 190 History: Jigme Namgyel - The Architect of United Bhutan ................................................ 201 རྫོང་ཁ། སྲུང་བསྐྱར་筲བ།.................................................................................................................. 211 རྫོང་ཁ། 歲ག་མཚམས། བརྗོད་མཚམས།དྫོན་མཚམས། ............................................................................. 217 རྫོང་ཁ། གཏང༌蝲ག། ཞུ༌蝲ག། འཕྲིན་蝲ག། ........................................................................................... 222 KEY STAGE – IV Self-Instructional Material Lesson No: 1 Subject: English Class: 9 – 10 Time: 50 minutes Topic: Present Tense 1. List down different types of verbs. 2. Construct sentences using different types of verbs. 3. Complete the given activities on Present tense and its four aspects. Introduction 2. 1. What is a tense? 2. How many types of tenses are there? 3. List down all types of tenses. Instruction: Read the information provided below very carefully in order to understand the concepts correctly. You are also advised to take notes of the important points. Tense Sequence There are 12 tenses in total. They help to mark tenses in the sentence to help us understand when an action took place, is taking place or is yet to take place. Thus, the job of the tenses is to mark present, past and future in a sentence. Note: It is very important to understand different forms of verbs before trying to understand how different types of tenses are formed. The table given below contains information on different types of verbs. Type of Verb Present Present Continuous Past Past Continuous Form Form Verb to ‘be’ am/is/are am/is/are+verb+being was/were was/were+verb+being Verb to ‘do’ do/does am/is/are +doing did was/were + doing Verb to ‘have’ have/has am/is/are +having had was/were+ having Other verbs: a. jump jump/jumps is/are + jumping jumped was/were +jumping b. write write/writes is/are+ writing wrote was/were + writing However, a complete table of tenses has another tense called “Perfect tense”. It is formed by adding Past Participle (pp) to the verb ‘have’ such as have, has and had. Perfect Tense = have/has/had + Past Participle (PP) What is past participle? It can be simply called as the third form of the verb. Study the following table to understand better. 4 English – Class 9-10 KEY STAGE – IV Self-Instructional Material Base Verb Present Form Past Form Past Participle (pp) eat eat, eats ate eaten play play, plays played played write write, writes wrote written read read, reads read read put put, puts put put Verb to ‘be’ am/is/are was/were been Verb to ‘have’ have/has had had Verb to ‘do’ do/does did done Note: Past participles can be formed by either adding –en, -ed, -t to the base form of a verb. Base verbs are verbs without ‘s’ or ‘es’ in them such as eat, play, learn, write, read and so on. Examples of perfect tenses 1. Deki has eaten her apple. 2. Dorji had already played two basketball matches when his friend invited him for another one. 3. They have written a long essay. 4. We had read the story thrice when the teacher asked us to read again. Note: Every verb that ends with ‘ed’ are not in past tense form. If the verb ending with ‘ed’ is preceded by ‘have’, ‘has’ or ‘had’ then it is in its past participle (pp) form. Example: 1. He played table tennis many times. (Past tense) 2. Tenzin had played table tennis for numerous times. (Past participle) Activity 1 Answer the following questions. 1. List down the following: a. Present and past form of “verb to be” b. Present and past form of “verb to do” c. Present and past form of “verb to have” 5 English – Class 9-10 KEY STAGE – IV Self-Instructional Material Activity 2 Complete the table given below by writing down the Present Simple, Past Simple and Past Participle form of the verbs and then constructing a sentence of your own in perfect tense. An example has been provided for you. Sl. No Root Present Past Past Sentence in word/Base simple simple Participle perfect tense verb 1 grow grow/grows grew grown Dorji had grown rice in his field mostly last year. 2 finish 3 sleep 4 fight 5 cut 6 begin 7 do 8 drink Now that you are familiar with different forms of verbs, it is time to learn how various tenses are formed. In this lesson, you will be learning only about Present tense and its four other aspects such as “simple, continuous, perfect