202110551-SUMMIT-STUDENT-WORKBOOK-EVS-G03-PART1

Formative 28) My food must have Stage 1: Speak to your family about the kinds of food prepared at home. Write down the names of five vegetables, and other foodstuffs that are cooked at home. Name of the vegetable What does it give us? Why do we need this? Stage 2: With the help of your teacher and family, find out what each of these food items give us. You will hear things like ‘protein’, ‘vitamins’, ‘minerals’, and so on. Write these in the second column of the table. Stage 3: With the help of your teacher and family, find out why these things are needed for our body. Write this in the third column, like, ‘Protein helps us to grow.’ 97 Our Diet

Inside the Lab Make sure you do these activities only with the help of a teacher or an adult. Activity A (Based on Lesson 4): Create Your Own Compass You know that the magnetic needle in a compass always lies in the north-south direction. You can create your own compass to know the directions. Let us see how to make one: You will need: • A magnet • A sewing needle • A cork disk • A cup/bowl/glass • A pair of pliers • Water You need to: 1) Rub the magnet against the sewing needle at least five times. (If you are using a weaker magnet, such as a flat refrigerator magnet, rub the needle at least a dozen times.) Always rub the magnet in the same direction against the needle. Your needle should get magnetised. 98 2) Now cut off about a quarter inch of the cork from one of the ends, making a small cork disk that is about one-quarter-inch tall. 3) Laying the cork disk on a flat surface, carefully push the needle through the side of the disk by using the pair of pliers. Push the needle all the way through the disk so that about the same length of needle shows on either side of the disk. 4) Fill a wide cup, drinking glass or bowl with at least one inch of water.

5) Put the cork disk (with the needle) on the water in the cup. Try to keep the disk 99 floating in the centre of the water, away from the sides of the cup. What does the needle do? When it stops moving, which direction does it point toward? 6) Does your homemade compass seem to work well? How is it limited in its use? Activity B (Based on Lesson 9): Rain Gauge Do you wish to measure the amount of rainfall around your house? You can measure the amount of rainfall using a rain gauge. Make your own rain gauge: You will need: • An empty 2-litre plastic bottle • A pair of scissors • Sticky tape • Ruler • Paper • Pencil You need to: 1) Cut around the plastic bottle about two-thirds of the way up. You can take the help of your parents or teacher. 2) Turn the top part of the bottle upside down. Now place it on the bottom part as shown in the picture. Fix it in place using the tape. 3) Make a scale in centimetres on a piece of tape, using a ruler. Fix it to the side of the bottle. Find a place outside to put your rain gauge. It must be open and away from trees. Inside the Lab

4) Check the rain gauge every day at the same time. Measure the amount of rainwater collected, and empty the bottle. 5) Note down the amount of rainwater collected in your weather diary. 100