What is this?
Stretch
What is this?
Twist
What is this?
Bend
What material is this?
Plastic
What material is this?
fabric
What material is this?
Plastic
What material is this?
Rubber
What material is this?
What material is this?
Rubber
What material is this?
Glass
What material is this?
paper
What material is this?
stones
What material is this?
Metal and diamond
What material is this?
Plastic
What are reversible changes?
When we come back to the material we had at the begining.
What are irreversible changes?
We cannot obtain the original material again.
