Grade 5

Matter and change

Observe how materials can change by heating, cooling, mixing, or dissolving, and notice which changes can reverse.

Category: World Around Us 11 min Advanced
Aa Tap Say वाचा

Ask what happened to the material and whether it can return to the original form. That helps separate reversible and irreversible changes.

Listen and learn

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I Picture card
Sound card Quick practice

Ice melts into water and water can freeze back into ice.

reversible change

The material is still water in both states.

Example: Melting and freezing are reversible.

S Picture card
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Sugar disappears when stirred into warm water, but the sugar is still there in solution.

dissolving

The sugar seems to vanish, but it mixes evenly.

Example: Dissolving is a physical change.

P Picture card
Sound card Quick practice

Paper burning into ash cannot be turned back into the same paper.

irreversible change

A new material forms after burning.

Example: Burning is irreversible.

S Picture card
Sound card Quick practice

Science habit: Describe the material before and after the change, not just the action you saw.

observation skill

Clear observation supports better science thinking.

Example: Before-after notes improve explanation.

More in this topic

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Grade 5

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Learn how tools such as levers, pulleys, wheels, and inclined planes make work easier.