What do these two changes have in common?
water evaporating from a lake
cooking an egg
Both are caused by heating. Both are caused by cooling. Both are chemical changes. Both are only physical changes.
Step 1: Think about each change.
Water evaporating from a lake is a change of state. So, it is a physical change. The liquid changes into a gas, but a different type of matter is not formed.
Cooking an egg is a chemical change. The heat causes the matter in the egg to change. Cooked egg and raw egg are different types of matter.
Step 2: Look at each answer choice.
Both are only physical changes.
Water evaporating is a physical change. But cooking an egg is not.
Both are chemical changes.
Cooking an egg is a chemical change. But water evaporating from a lake is not.
Both are caused by heating.
Both changes are caused by heating.
Both are caused by cooling.
Neither change is caused by cooling.