Across
- 3. the size, extent, or importance (magnitude) of something relative to something else
- 4. the smallest piece of matter that has the properties of an element; a combination of three subatomic particles: protons, neutrons, and electrons
- 6. a body that orbits the sun, is massive enough for its own gravity to make it round, and has cleared out smaller objects around its orbit; there are 8 planets in our solar system
- 8. to travel in a circle around an object
- 9. a measure of the amount of matter that makes up an object; a property of matter
- 10. all knowledge gained from experiments
- 11. the gravitational force exerted on an object by a planet or moon
Down
- 1. a relationship between events or things, where one is the result of the other
- 2. a collection of planets and other objects that orbit a star
- 5. a push or pull that acts on an object, changing its speed, direction or shape
- 6. something that happens in a regular and repeated way
- 7. a force of attraction between all matter