00 (b) Cut all trees near our (c) Keep our homes dirty. (d) Plant trees near our homes. Answer the following questions. 1. How do we know our Earth is round like a big ball? 2. What is necessary for life on the Earth? 3. What are deserts? STIVITY/PROJECT 1 three lines by which we can keep our Earth clean and green.
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1. How do we know Our earth is round like a ball?
ans: First Earth is not round in shape it's oval shape.The only shape that casts a round shadow no matter which direction it is pointed is a sphere, and the ancient Greeks deduced that this must mean Earth is spherical.
2.What is necessary for life on the Earth?
ans: Everything is necessary on this planet every resource everything but the most important thing to preserve is Air to inhale,water to drink,food to eat.
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