Reversible and Irreversible changes

What is the meaning of Irreversible ?

• Something that can return to it's normal shape

• Something that can't return to it's normal shape

What is the meaning of Reversible ?

• Something that can't return ti it's normal shape

• Something that can return to it's normal shape

When a stick of butter melts it changes from a...

• solid to gas
• gas to solid
• solid to liquid

Tags

NGSS.MS-PS1-4

A chemical change

• doesn't really change much.
• creates a new substance
• is a change in the state of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Of the changes below, which is NOT an irreversible change:

• rusting

• cooking

• melting

• burning

Choose the TWO reversible changes:

• condensing

• rusting

• freezing

• cooking

This involves using a strainer or a big screen to separate the components of solid mixtures.

• filtration

• shaking

• sieving

• evaporation

This method is used in separating soluble solid from a liquid such as salt from water.

• evaporation

• sieving

• decanting

• filtration

Name the separation technique shown in the diagram.

• evaporation

• boiling

• filtration

• heating

Burning a candle is a type of reversible reaction.

• True

• False