Cheryl has a mug she says is made up of matter. heather says that the hot choclate 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 to small to see. which best describes who is correct ?

Cheryl, Heather and Keaton all are correct.

Explanation:

Everything around you is made of matter and matter is anything that has mass and occupies space or in other words, anything which has volume is called matter.

Here, in the given example, Cheryl, Heather and Keaton all are correct because the mug, the hot chocolate which is inside the mug and the steam coming out of it, all have mass. Therefore, all are correct except for Mikayla.

photocells convert light energy to electricity

thermal energy is the answer