Question

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Write the results of activity 1.3 & 1.5 or explain what will happen
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Answer 1

Activity: 1.3


Solution :

One has to go very close to get the smell of the unlit incense stick.

After lighting the incense stick, smoke started to coming out of it.

Yes now, we can get smell of incense stick sitting at a distance.

This shows that,

Matters consist of small particles which are moving continuously. This means that particles of matter possess kinetic energy.

Smell of lighted incense stick diffuse with air present in air and reaches to us sitting at a distance.

activity1. 5

Solid crystals starts mixing in the water in the form of thread like structures.

Coming of thread like structures in cold water is slower than that of in the hot water.

As time passes, crystal getting dissolved in water both hot and cold.

But it takes more time to get crystal dissolved in cold water than that of hot water.

This suggest that, matters are made up of tiny particles and these particles are in motion continuously.

Rate of mixing increases with increase in temperature. This is because of heat particles of matter gets more kinetic energy and they starts moving faster.