Reversible and Irreversible

What's a Reversible change?

• Something physical that can be undone

• Something mental that can be undone

• A change that is wrong

• An opinion that can't be proven

Name a type of reversible change

• Burning

• Explosions

• Melting

• Vibrations

Is boiling a Reversible change?

• YES

• NO

If you burnt a candle, which of the following would be a reversible change?

• If the wick disintegrates

• If the solid candle wax melts

• The flame produces smoke

• All of the above

If you're dissolving a powder, is it a irreversible change?

• YES

• NO

• There is not enough information to answer this question

Burnt sparklers and burnt book pages are both:

• Reversible

• Irreversible

A change that can be repaired, reconstructed, fixed or returned to it's original form is called

• Reversible

• Irreversible

• Same

• Constant

Choose all the reversible changes

• Melting

• Burning

• Freezing

• Boiling

• Mixing

What action must you do to undo melting

• Mix it up

• Put it in front of a powerful fan

• Blow on it

• Freeze it again

Is exploding something

• irreversible

• reversible