What do these two changes have in common?
burning a candle
a banana getting ripe on the counter
Both are chemical changes. Both are caused by cooling. Both are only physical changes. Both are caused by heating.
Step 1: Think about each change.
Burning a candle is a chemical change. Both the wick and the melted wax burn. They react with oxygen in the air and turn into soot, carbon dioxide, and water.
A banana getting ripe on the counter is a chemical change. As a banana ripens, the type of matter in it changes. The peel changes color and the inside becomes softer and sweeter.
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.
Burning is caused by heating. But a banana getting ripe is not.
Both are caused by cooling.
Neither change is caused by cooling.