Cheryl has a mug that she says is made up of matter. Heather says that the hot chocolate inside the cup is made up of matter, too. Keaton says that the steam coming from the cup is also made up of matter. Mikayla says that none of it is matter because matter is too small to see. Which best describes who is correct?

Matter is anything that has mass and takes up space. The mug, the hot chocolate, and the steam are all matter; steam is a gas, and gases still have mass and occupy space. Mikayla is mistaken because matter can be visible or invisible, and being too small to see does not determine whether something is matter. So Cheryl, Heather, and Keaton are correct.

AI-written and checked against the verified answer.