Key Feature of Physical Change.

What happen when solid/liquid/gas is heated?

What happens when expansion occurs?

What happens when contraction occurs?

What happen in thermometers?

Solid to liquid

Liquid to gas

Gas to liquid

Liquid to solid

Solid to gas

Gas to solid

What is melting?

What is freezing?

What is evaporation?

What happens when liquid is at its boiling point?

What is condensation?

Explain why do you see fogs.

Is mixing a physical change?

Explain how dissolving works.

What happens when solvent is removed?

Identifying a chemical change

Give an example that physical and chemical change occurs in the same time

How is changing colour is a chemical change?

Why is mixing blue paint and yellow paint isn't a chemical change even though the colour changed to green?