What do these two changes have in common?
an iceberg melting slowly
breaking a plate
A: Both are chemical changes.
B: Both are only physical changes.
C: Both are caused by heating.
D: Both are caused by cooling.
Step 1: Think about each change.
An iceberg melting is a change of state. So, it is a physical change. An iceberg is made of frozen water. As it melts, the water changes from a solid to a liquid. But a different type of matter is not formed.
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.
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.
An iceberg melting is caused by heating. But breaking a plate is not.
Both are caused by cooling.
Neither change is caused by cooling.