What do these two changes have in common?
breaking a plate
molding clay into the shape of a pot
Both are only physical changes. Both are caused by cooling. Both are caused by heating. Both are chemical changes.
Step 1: Think about each change.
Breaking a plate is a physical change. The plate gets broken into pieces. But each piece is still made of the same type of matter.
Molding clay into the shape of a pot is a physical change. The clay gets a different shape. But it is 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.