Understanding Changes: Reversible vs Irreversible

What is a reversible change?

• A reversible change is a change that happens spontaneously.

• A reversible change is a permanent alteration.

• A reversible change cannot be undone.

• A reversible change is a change that can be reversed to return to the original state.

Give an example of a reversible change.

• Melting ice

• Dissolving sugar in water

• Rusting iron

• Burning wood

What happens to ice when it melts?

• Ice becomes solid again after melting.

• Ice turns into gas when it melts.

• Ice transforms into steam when it melts.

• Ice turns into liquid water when it melts.

Can you turn water back into ice?

• Yes, by lowering the temperature of water below freezing.

• Yes, by adding salt to the water.

• No, ice cannot be formed from water.

• Yes, by boiling the water.

What is an irreversible change?

• A change that occurs without any effect.

• A reversible change that can be undone.

• An irreversible change is a transformation that cannot be undone.

• A transformation that happens instantly.

What happens when you rip a piece of paper?

• The paper is set on fire.

• The paper is torn into smaller pieces.

• The paper becomes a solid block.

• The paper magically repairs itself.

Is folding paper a reversible change?

• Yes, folding paper is a reversible change.

• Folding paper cannot be undone.

• Folding paper changes its chemical composition.

• Folding paper is an irreversible change.

What is one example of an irreversible change?

• Rusting of iron

• Baking a cake

• Dissolving sugar in water

• Melting ice

Can you change a toy made of building blocks back to its original form?

• It depends on the type of blocks

• Only if you have the original instructions

• Yes

• No, it's permanently altered

What happens to a balloon when you pop it?

• The balloon slowly deflates without making a sound.

• The balloon floats higher in the air.

• The balloon bursts, collapses, and the air escapes quickly.

• The balloon changes color and expands.