Weight and Matter

2. The natural satellite of any planet.
7. A large celestial object that orbits a star.
10. A machine designed to convert energy into useful mechanical motion.
11. Some outside influence that can change the motion of a body, hold bodies close to one another, or produce motion or stress in a stationary body.
12. Something propelled through the air or space.
14. A measure of expressing a standard physical quantity.
16. The measure of how condensed some object is, found by dividing its mass by its volume.
17. Any material that will release energy during a controlled chemical or nuclear reaction.

1. A network of parts that work to achieve some function.
3. The curbed path of a celestial object or spacecraft around a galaxy, star, or planet.
4. Space Station An artificial satellite that orbits the Earth.
5. The solar system's largest planet.
6. A number that shows how much an object resists speeding up or slowing down.
8. A building block of some larger structure. (in chemistry) Each of more than one hundred substances for which the smallest unit of each is a single atom.
9. The force that attracts anything with Mass, or bilk, towards any other thing with mass.
13. Something that is basic or serves as the foundation for another thing or idea.
15. Something that occupies space and has mass.