PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1. Take a big ball or a pitcher.
2. Paint half of it white and half black.
3. Go out into the playground with two of your friends.
4. Draw a circle of radius of about 2\ m on the ground.
5. Divide the circle into eight equal parts as shown in figure.
A boy drawing a circle on the ground
6. Stand at the centre of the circle.
7. Ask a friend to hold the ball at different points of the circle.
8. Ask her to keep the white portion of the ball always towards the Sun.
The moon appears different at different positions in its orbit
NOTE: If you are performing this activity in the morning then the white portion of the ball should be kept towards the east.
If the activity is being performed in the afternoon then the white portion of the ball should be kept towards the west.
9. In each case the line dividing the white and black portions is kept vertical.
10. Standing at the centre of the circle observe the visible white portion of the ball while your friend stands at the points on the circle marked earlier.
11. Draw the shape of the white portion as you see it.
12. Compare your drawings with the different phases of the moon as shown in figure.
Positions of the moon in its orbit and its corresponding phases
Important!
This is a experiment-based exercise. Write the answer in a sheet and compare it with the solution given below.
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