shape change gb 2

What type of change happens when a material cannot return to its original shape?

• Physical change

• Temporary change

• Permanent change

• Reversible change

Pressing and twisting materials can cause:

• A change in temperature

• A change in shape

• A chemical reaction

• A color change

Which factor can change the size of a material?

• Painting it

• Heating or cooling it

• Adding water

• Polishing it

Which of these changes is dangerous?

• Bending a wire

• Breaking glass

• Twisting a rubber band

• Melting ice

Heating a material often causes it to:

• Shrink

• Stay the same

• Expand

• Change color

When materials cool down, they generally:

• Expand

• Change color

• Shrink

• Stay the same

Which of the following is an example of a useful physical change?

• Breaking a mirror

• Bending metal to shape it

• Cracking a plate

• Burning paper