Earth Sun Moon

3. When day and night are the exact same length.
7. The spinning of Earth on its axis.
8. A push or Pull.
9. first law of motion Says the an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force.
11. The measure of the force of gravity on an object.
12. of universal gravitation States every object in the universe attracts every other object.
14. A force that attracts all objects toward each other.

1. The movement of one object around another.
2. The imaginary line that passes through Earth’s center and North and South poles.
4. The tendency of an object to resist a change in motion.
5. A system of organizing time that defines the beginning, length, and division of a year.
6. Earth’s path
10. When the sun appears farthest North or South of the equator.
13. The amount of matter in an object.