Which of the following is an example of the conversion of kinetic energy into gravitational potential energy?
a) a person walking up a hill
b) a person parachuting out of an airplane
c) a person skiing down a hill
d) a car racing around a oval track

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

Compare and contrast physical changes with chemical changes.

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy