Liam notices that bubbles form under the water at each pencil tip. What type of change is happening?

Answer 1

The formation of bubbles under the water at each pencil tip indicates a physical change. When air or gas is released from the pencil tip into the water, it creates bubbles. This process typically involves a change in the state of matter (from dissolved gas to gas in bubble form) and does not result in a change in the chemical composition of the substances involved. Thus, it is classified as a physical change.