Which are clues a chemical change is happening?

Question

seeing light and feeling heat

seeing matter change in size

seeing matter change in shape

seeing and feeling water

Answer 1

Some clues that a chemical change is happening include seeing light and feeling heat, seeing matter change in size, and seeing matter change in shape. Another clue that a chemical change may be occurring is if you see and feel water, such as in a reaction where water is produced as a product.