1. Velocity
2. Time
3. Idk
4. Idk
5. D. I think it may be A. but I think D.
The observable universe consists of galaxies and other matter that can, principally, be seen from Earth because the light signals have had time to reach us. Not everything in the sky is the way it is when we see it, because of the distance the light travels to reach us.
Hope this helps :)
Potential energy is highest at the top of the loop, and kinetic energy is highest at the bottom of the loop.
