Boiling point and evaporation — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Choose the correct reason for the actions:

1. Since an ice cube is a solid substance, why does it float on water?

The particles in the water is less denser than the ice
When water freezes, it expands, making ice less dense than liquid water
The surface tension of water is higher
The volume of the water is higher

2. The aroma of hot, delicious food reaches you from several meters away, but not the smell of ice creams; why?

The cold breeze can travel faster in the air
Gas molecules can travel in air medium
If the heat applied to the solid it will melt
The melting point of ice is 0 degree Celsius

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