Easy Science Class 9 Level 2

Why does evaporation cause cooling?

वाष्पीकरण से cooling क्यों होती है?

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Correct Answer

A. तेज particles heat लेकर escape करते हैं / Fast particles escape taking heat

Explanation

Step 1: Identify the concept: this is about cooling by evaporation. Step 2: High energy particles escape and reduce the average energy of remaining liquid. Step 3: Remember body cooling by sweating works for the same reason.

Step 1: concept पहचानें: यह evaporation cooling से जुड़ा है। Step 2: High energy particles बाहर निकलते हैं जिससे बाकी liquid की average energy कम होती है। Step 3: Sweating से body cooling इसी कारण होती है याद रखें।

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