What do these two changes have in common?
cutting your fingernails
stretching a rubber band

 - Both are caused by cooling.
 - Both are caused by heating.
 - Both are chemical changes.
 - Both are only physical changes.
Step 1: Think about each change.
Cutting your fingernails is a physical change. Your fingernails are shorter after you cut them. But the pieces are still made of the same type of matter as the uncut fingernails.
Stretching a rubber band is a physical change. The rubber band gets longer. But it is still made of the same type of matter as before.
Step 2: Look at each answer choice.
Both are only physical changes.
Both changes are physical changes. No new matter is created.
Both are chemical changes.
Both changes are physical changes. They are not chemical changes.
Both are caused by heating.
Neither change is caused by heating.
Both are caused by cooling.
Neither change is caused by cooling.