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.
What do these two changes have in common?
water evaporating from a lake
cooking an egg
A: Both are caused by heating.
B: Both are caused by cooling.
C: Both are chemical changes.
D: Both are only physical changes.