Big Idea 5 vocabulary

4. phases an indication of the fraction of the moon that is illuminated as seen from Earth.
8. A term used to describe the magnetic force exerted by oppositely charged objects or to describe the gravitational force that pulls objects toward each other.
10. An object that is found in the solar system, orbits the Sun, and is much smaller than a planet.
11. The amount of matter a substance or object has.
12. a group of billions of stars, the objects that orbit the stars, gas, and dust.
15. Half of Earth.
16. A natural object that orbits a planet.
17. everything that exists.

1. An object made of rock, ice, dust, and gas that revolves around the Sun.
2. The path of one object in space around another object
3. A large body in space that orbits a star and does not produce its own light.
5. system A system of planets and other bodies that orbits a star.
6. A large object in space that is made of gas and produces its own light.
7. A pattern of stars that form an imaginary picture in the sky
8. the imaginary line around which Earth spins as it rotates
9. The turning of an object on its axis.
13. planet nearly round bodies whose orbits cross the orbits of other bodies.
14. The motion of one object around another object.