Across
- 4. an electronic device that is sent into space and moves around the earth or another planet
- 5. the relationship between two groups or amounts that expresses how much bigger one is than the other
- 6. denoting something, especially an animal or plant, that is much smaller than the usual size for its type or species.
- 8. the smallest possible packets of electromagnetic energy
- 10. the physical universe beyond the earth's atmosphere.
- 12. a device that changes energy of movement into electrical energy
- 13. lose consciousness for a short time because of a temporarily insufficient supply of oxygen
- 14. a form of matter in which many of the electrons wander around freely among the nuclei of the atoms
Down
- 1. a straight line passing from side to side through the center of a body or figure
- 2. the relation between the real size of something and its size on a map, model, or diagram
- 3. an aggregation of matter in the universe (such as a planet, star, or nebula)
- 7. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
- 9. a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity
- 11. the radiant energy per unit time which is emitted, transmitted, reflected or received by an object