Changes in materials

Changing the size or shape of an object is a .............

• chemical change

• physical change

• impossible

When I ______ the sponge, I change its shape.

• pull

• squeeze

• stretch

• hammer

When I stretch the elastic band I change its.....

• size only

• shape only

• size and shape

• colour

This glass has been hammered. How has it changed?

• size

• shape

• size and shape

The shape of the plastic spoon has been changed by.....

• pulling

• squeezing

• twisting

• bending

Look at the picture.

When the air in the bottle is ______, it expands.

• heated

• cooled

• big

• small

When the water is heated it........

• contracts

• expands

• cools

• changes colour

Why does the balloon get smaller?

• the air inside it contracts when cooled

• the air inside it expands when cooled

When the metal ball is cooled, it fits through the hoop. Why?

• Metal contracts when cooled.

• Metal expands when cooled.

• The hoop is bigger.

• The ball is a different shape.

EXPAND means the same as.......

• get smaller

• get bigger

• change shape

• change colour