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1. 1.

   Renu spends a lot of her time outdoors. She walks to school in the morning, plays in the school playground in the afternoon, and walks back home in the evening. She notices that the length of her shadow does not remain the same throughout the day.

   1. Do you think Renu is right? Does the length of her shadow really change?
   2. Renu is not likely to grow tall or become short during the span of a single day, so why do you think her shadow changes in length through the day?
   3. One day when Renus was running randomly in the playground, Renu found that her shadow had completely disappeared! She looked up to see if the Sun had gone behind a cloud, or if she had strayed under sa tree. No, everything was clear!Then, she turned around and found her shadow behind her. Why had Renu's shadow gone behind her?
   4. We know that for a shadow to be formed, we need three things: a source of light, an object that obstructs light, and a screen. Can you identify these three things in Renu's case?
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   Answer:

   S A M P L E

   1. Yes, Renu is right. The length of her shadow changes during ...
   2. Her shadow changes because the Sun’s position in the sky changes. Low Sun in morning/evening makes long shadows, while overhead Sun at noon makes short ...
   3. ...
   4. ...