What do these two changes have in common?
slicing cheese
carving a piece of wood
A: Both are caused by heating.
B: Both are chemical changes.
C: Both are caused by cooling.
D: Both are only physical changes.
Step 1: Think about each change.
Slicing cheese is a physical change. The cheese changes shape. But it is still made of the same type of matter.
Carving a piece of wood is a physical change. The wood changes shape, but it is still made of the same type of matter.
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.