What do these two changes have in common?
baking a loaf of bread
cooking a pancake

 - Both are caused by cooling.
 - Both are chemical changes.
 - Both are only physical changes.
Step 1: Think about each change.
Baking a loaf of bread is a chemical change. Bread is made from dough. Baking turns the dough into bread. The bread is a different type of matter than the dough.
Cooking a pancake is a chemical change. Pancakes are made from pancake batter. A cooked pancake is a different type of matter than pancake batter. Pancake batter is wet and slippery. Cooked pancakes are fluffy and can be good to eat!
Step 2: Look at each answer choice.
Both are only physical changes.
Both changes are chemical changes. They are not physical changes.
Both are chemical changes.
Both changes are chemical changes. The type of matter before and after each change is different.
Both are caused by heating.
Both changes are caused by heating.
Both are caused by cooling.
Neither change is caused by cooling.