Why is the smoke going up. How does heat transfer take place in liquids? Class 7
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Why is the smoke going up. How does heat transfer take place in liquids? Class 7
Question 1.
Why is the smoke going up? Class 7
Answer:
When the smoke is produced, it is hot. Due to convection, the hot smoke is lighter than the surrounding air and it rises upwards. The cold air take the space of hot air (smoke) creating a continuous cycle that help the smoke going upward.
Question 2.
How does heat transfer take place in liquids? Do liquids also rise up when heated like air? Class 7
Answer:
When water is heated in a container, the water at thê bottom becomes hot, expands and becomes lighter, causing it to rise. As the warmer water rises, cooler and heavier water moves down to take its place. This process is called convection, and it continues till the entire liquid is heated.
