Across
- 5. a change in the velocity of a body
- 7. a large, circular pit in the surface of a planet or other body in space usually formed when two bodies in space collide
- 9. a body of ice and dust that travels in a long narrow orbit around the sun
- 11. a small object made of rock or metal that orbits the sun
- 12. a force that exists between any two objects that have mass
Down
- 1. layers of gas that surround a planet
- 2. the energy an object has due to its motion
- 3. a large circular mass that revolves around a star
- 4. a streak of light in the sky that forms when a piece of rock from space burns up in Earth's atmosphere
- 6. a pull or push that is applied to an object
- 8. the speed and direction of moving objects
- 10. the amount of matter in an object