uunderstanding materials and how they change

what happens to ice when is heated?

• it freezes

• it melts

• it breaks

• it evaporates

what is an example of a natural material?

• plastic

• glass

• wood

• nylon

which of these is a property of glass?

• absorbent

• waterproof

• transparent

• soft

what is the best material to use for a raincoat?

• wool

• paper

• plastic

• cotton

which change is usually IRREVERSIBLE?

• melting butter

• freezing water

• baking a cake

• melting chocolate

what happens when water is cooled below 0° C ?

• it boils

• it become a gas

• it turns into ice

• it evaporates

which material is man-made?

• rubber

• wool

• cotton

• silk

what property does a towel have?

• absorbent

• waterproof

• transparent

• shiny

true or false?

heating always turns a material into a liquid

• true

• false

true or false?

all materials can return to their original state after they change

• false

• true