Across
- 3. an interstellar cloud made up of hydrogen, gas, plasma, helium gas, and dust.
- 4. waves of electromagnetic energy that people can see
- 6. Oxygen, Hydrogen, Nitrogen.
- 7. Our solar system is part of the Milky Way ___
- 9. The Earth revolves around the ____
- 10. Astronomers use ____ to watch the stars.
- 12. the distance light travels in a vacuum in one year
- 14. to make something appear larger, usually using one of more lenses
Down
- 1. Water boils at 100 degrees ____
- 2. having to do with the eye or lenses
- 5. The chemical element consisting of one proton and one electron
- 8. everything that exists in, on and around the Earth
- 11. a massive ball of gas in outer space that gives off heat, light and other forms of radiation
- 13. the transfer of thermal energy