What do these two changes have in common?
mixing chocolate syrup into milk
water vapor condensing on a bathroom mirror
Both are caused by heating. Both are only physical changes. Both are caused by cooling. Both are chemical changes.
Step 1: Think about each change.
Mixing chocolate syrup into milk is a physical change. The chocolate syrup and milk make a mixture. Making a mixture does not form a different type of matter.
Water vapor condensing on a bathroom mirror is a change of state. So, it is a physical change. The water changes state from gas in the air to liquid water on the mirror. But the water vapor and the liquid water are both made of water.
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.
Neither change is caused by heating.
Both are caused by cooling.
Water vapor condensing is caused by cooling. But mixing chocolate syrup into milk is not.