Page 1 :
Revision worksheet, Chapter - 22, Earth and the sky, Q.1 answer in one word or words:, 1. A layer of air around the earth., 2. A group of stars., 3. The night when the moon is not visible., 4. The night when we can see the full lit surface of the Moon., 5. A heavenly body that revolves around a planet., Q.II state true or false:, 1. The sun is a yellow star., 2. The moon has air and water., 3. The Moon gets its light from the Earth., 4. The movement of the Earth on its axis is called rotation., 5. The time from one full moon to the next is three weeks, or about 21 days.