changes of state

... is the process in which solids change into liquids.

• melting

• vaporization

• freezing

• condensation

... is the process in which a liquids boils and changes into a gas.

• melting

• evaporation

• freezing

• vaporizaion

The boiling point of pure water is ...

• 100 ^o C

• 120 ^o C

• 220 ^o C

• 450 ^o C

What is the process called when liquid water changes to solid?

(a)  

At what temperature does ice melt?

• 0^o C

• 1^o C

• 100^o C

• -1^o C