Teeth and Microbes

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Teeth and Microbes DELHI PUBLIC SCHOOL,B.S.CITY SESSION 2020-2021 Note: All work to be done in a thin copy. Subject: GSC Class:4 Topic – Teeth and Microbes Our teeth help us to grind, chew and bite etc. The tooth consists of a visible part which is above the gums called as the crown. The part of the tooth which is inside the gums is called the root. It holds the tooth firmly in place. The outer layer of the crown is made of a substance called enamel. It is very hard. Dentine is a layer beneath the enamel. The innermost portion of the tooth is called pulp. It contains nerves and blood vessels. Microbes – A microbe is a very small living thing, which you can only see under a microscope. Some microbes are useful to us while some are harmful. Harmful microbes can cause diseases. These disease causing microbes are called germs. The four main kinds of microbes are bacteria, fungi, protozoa and viruses. Assignment : Q1) What is a microbe? Q2) Name the different types of microbes. Q3) What are germs? Q4) Name them – a) The outer portion of the tooth above the gums - b) In a tooth blood vessels and nerves are present in – Subject: G.K Class:4 Top 10 Highest Peaks Of India 1. Kangchenjunga Peak Height: 8586 metre Location: Sikkim Facts: Kangchenjunga is the third highest peak in the world and 1st in India. It stands tall with an elevation of 8,586 meters (28,169 ft). The literal meaning of Kanchenjunga is “The Five Treasures of Snows” (namely gold, silver, gems, grain, and holy books). Kangchenjunga section contains five peaks and the region has 12 more peaks over 7,000 m (23,000 ft). The highest mountain Kangchenjunga is located at the border of India and Nepal in the great Himalayas range, Sikkim. 2. Nanda Devi Peak Height: 7816metre Location:Uttrakhand Facts: Nanda Devi is one of the highest mountain in the world and ranked second in India. This is the highest peak (entirely) in the country because Kanchenjunga lies on the border areas of India and Nepal. It was the highest known mountain in the world until 1808 when western surveyors discovered Dhaulagiri 3. Kamet Peak Height: 7756metre Location: Uttrakhand Facts: The Kamet is the highest summit in the Zaskar mountain Range of Garhwal region in the Chamoli District of Uttarakhand. Kamet is second highest mountain summit of Garhwal Himalayas.Kamet mountain peak is surrounded by three major neighboring peaks and lies very close the Tibet. It is situated north of the main range and is more remote and therefore less accessible than some Himalayan peaks. 4. Saltoro Kangri Peak Height: 7742metre Location:Jammu&Kashmir Facts: The Saltoro Kangri is the highest peak of Saltoro Mountain ranges, a sub range of Karakoram. (the biggest range of greater Himalaya mountains). Saltoro Mountains are situated at the center of great Karakoram and very near to the longest glaciers in the world, the Siachen Glacier. 5. Saser Kangri Peak Height: 7,672metre Location: Jammu&Kashmir Facts: The Saser Kangri are group of five majestic mountain peaks. It is the highest mountain peak among the all five brothers with an elevation of 7,672 m (25,171 ft) and Ranked 35th in the world. 6. Mamostong Kangri Peak Height: 7516metre Location: Jammu&Kashmir Facts: Mamostong Kangri is the highest mountain of sub-ranges Rimo Mustagh of the Great Karakoram range. Mamostong Kangri is located in the remote area of the Siachen Glacier. Mamostong Kangri is ranked 48th independent highest peak in the world 7. Rimo Peak Height: 7385metre Location: Jammu&Kashmir Facts: The Rimo is situated at the northern side of Rimo Muztagh in the famous the Karakoram ranges. Rimo mountain series consists of four peaks namely, the Rimo I is the highest peak among them. To the northeast lie the North-east Rimo Mountains and the Karakoram Pass, which is one of the most important trade route in central Asia. 8. Hardeol Peak Height:7151metre Location:Uttrakhand Facts: Hardeol also called as Temple of God is one of the major mountain peak of the Kumaon Himalaya located at the northern side of Sanctuary and guarding the Nanda Devi. It is located in the Milam valley of Pithoragarh district in Uttarakhand. 9. Chaukamba Peak Height:7138metre Location:Uttrakhand Facts: The Chaukhamba summit is the highest peak in the group of the Gangotri located in the Garhwal Himalaya region of Uttarakhand. The Gangotri Group has total four peaks and Chaukhamba I is the highest among them. Chaukhamba got its name due to the four big peaks along with each other. 10. Trisul Peak Height: 7120metre Location: Uttrakhand Facts: The highest peak of the group is Trisul I. Its name is derived from Trishul weapon of Lord Shiva. Trisul mountain peaks are near to the Nanda Devi sanctuary. Subject: TECHNICAL ACTIVITY Class:4 RECAPITULATION OF THE TOPIC-SELECTING AND EDITING OBJECTS SELECT TOOL. In the previous Econtent you have learnt the use of Rectangular selection . Now you are going to learn how to use the Free-form selection and select all . FREE-FORM SELECTION ● To select any irregularly shaped part of the picture, click Free-form selection , and then drag the pointer to select the part of the picture you want to work with. To select the whole picture, click Select all. ● To delete the selected object, click DELETE. FREE-FORM SELECTION IMAGE CROP- Use Crop to crop a picture so only the part you selected appears in your picture. Cropping lets you change the picture so only the selected object is visible. 1. On the Home tab, in the Image group, click the Arrow under Select, click the Rectangular selection. 2 . Drag the pointer to select the part of the picture you want to show. 3.In the Image group, click Crop. CROPPED IMAGE RESIZING A PICTURE Use Resize option to resize the whole image or a part of a picture. RESIZE THE WHOLE PICTURE 1 . On the Home tab, in the Image group, click Resize. 2 . In the Resize area, click Pixels, and then enter a new width in the Horizontal box or new height in the Vertical EXERCISE 1. Answer to the following questions. (a)How do you save a cropped image in MS PAINT? (b)What does resizing do to an image in MS PAINT? 2. Draw a picture of a garden using MS PAINT. Crop the picture of a flower to a specific size. .
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