Describe why the shape of the moon appears to change over time. A)The moon is changing shape as it orbits around Earth and the sun.

B)The moon creates more light as it changes its position around Earth.

C)The sun orbits Earth, giving off different amounts of light to the moon.

D)The sun is lighting up different parts of the moon during the moon's orbit around Earth.

explanation:

newton's third law, for every action there is an equal and opposite reaction.

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.