The water contained in a geyser system gains energy from the underground material surrounding it. The water molecules gain kinetic energy and this results in an increase in the pressure of the water. Eventually the geyser erupts and expels water into the air above ground. Which of the following types of energy is the source for the initial energy gain of the water?
A: thermal

The temperature in a hot star is high enough to pull electrons away from atoms. What state of matter results from this process?
A: plasma

Which tool should be used to compare the growth of an algal colony growing in a petri dish?
A: a hand lens

What happens during photosynthesis?
A:
Plants change light energy into food energy.