What do these two changes have in common?
cooking an egg
an iceberg melting slowly
Both are chemical changes. Both are only physical changes. Both are caused by cooling. Both are caused by heating.
Step 1: Think about each change.
Cooking an egg is a chemical change. The heat causes the matter in the egg to change. Cooked eggs and raw eggs are made of different types of matter.
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.
Step 2: Look at each answer choice.
Both are only physical changes.
An iceberg melting is a physical change. But cooking an egg is not.
Both are chemical changes.
Cooking an egg is a chemical change. But an iceberg melting is not.
Both are caused by heating.
Both changes are caused by heating.
Both are caused by cooling.
Neither change is caused by cooling.