shape change gb

Which of the following is NOT a way materials can change?

• Pressing

• Twisting

• Painting

• Bending

What happens to the size of a metal rod when heated?

• It becomes shorter

• It becomes longer

• It stays the same

• It changes color

When a metal wire is cooled, its size:

• Becomes longer

• Becomes shorter

• Stays the same

• Expands

Changes in size and shape of materials are called:

• Chemical changes

• Physical changes

• Permanent changes

• Temporary changes

A change is temporary if the material:

• Becomes longer

• Cannot return to its original form

• Changes color permanently

• Can return to its original form

Which of the following is a permanent change?

• Bending a plastic ruler

• Melting ice

• Breaking a ceramic plate

• Twisting a rubber band

Heating a metal rod results in:

• It becoming shorter

• No change in size

• It becoming longer

• It melting immediately

Cooling a material generally causes it to:

• Expand

• Change color

• Shrink

• Melt

A temporary change is one that:

• Lasts forever

• Can be reversed

• Involves breaking the material

• Cannot be undone

Which of the following is an example of a temporary change?

• Crumpling a piece of paper

• Burning wood

• Breaking glass

• Rusting iron