Changes in materials

Changes in size, shape and colour are called physical changes. Is it true or false?

• true

• false

Materials will expand when they are heated. Is it true or false?

• true

• false

hammering a glass will change its________________

• shape

• size

• shape and size

Bending a plastic ruler changes its____________

• shape

• size

• shape and size

A metal fork is put in a freezer. What would be happened to the fork?

• It will expand

• It will contract

The original length of a material is 5 cm. It is pulled and the length changes to 10 cm. If it is a permanent change.

How long would the length of the material be now ?

• 10 cm

• 17 cm

• 5 cm

Look at the picture. Is it permanent change or temporary?

• permanent

• temporary

Look at the picture! How has the shape changed? ________________

• bending

• twisting

• pressing

Look at this picture. Is it temporary or permanent change?

• permanent

• temporary

Look at this picture. How has the shape changed?______________

• bending

• pressing

• twisting