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DISCUSSION POINTS How can we identify if

the fruits haveripened?

How does it spread?

What is thisphenomenon called?

By smell

It spreads throughair

Sublimation

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CONSOLIDATION

Diffusion is the spontaneousmixing of different particles havingfreedom of movement

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DISCUSSION POINTSWhat do you observe?

Sometimes, we useheat to ripen fruits.

Why?

What is the relationbetween particlemovement anddiffusion?

Ink diffuses intowater

When heat increases,

freedom of movementof particles alsoincreases.

When particlemovement increases,diffusion increases

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CONSOLIDATION

When molecular movement increases,diffusion also increases

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DISCUSSION POINTSWhat do you observe?

What is the reason?

How will you explainit?

Ink does not spreadinto glass

Because glass is in

solid state

In solids, particles

are closely packed,so freedom ofmovement is less

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CONSOLIDATION

Diffusion takes place in all states ofmatter. But it is faster in gases than inliquids and it is extremely slow Insolids.