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Practice each question, then open the answer or worked solution.
Why do children always slide down the slide and not slide up? If this slide were there in Sunita’s spacecraft, would children slide like this? Why?
Answer: Due to the gravitational force of the earth, children slide down and cannot slide up. If this slide was in Sunita’s spacecraft, then children would not enjoy it since there is zero gravity and children cannot slide; instead, they would float.
Why do we see stars mostly at night?
Answer: We see stars only at night because there is no sunlight at night.
Looking at earth from the space, Sunita said, “Different countries cannot be seen as separate from here. These lines are on paper. They are made by us.” What do you understand by this?
Answer: Humans have created boundary lines; indeed, it’s not nature. So from space, we cannot identify a particular country or a city; just for human understanding, they have drawn the lines and separated the countries.
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