Across
- 4. waves of electromagnetic energy that people can see
- 5. to make something appear larger
- 10. everything that exists in, on, and around Earth
- 11. light ____ : the distance light travels in a vacuum in one year, about 6 trillion miles
- 12. a state of matter without defined volume or shape
- 14. an instrument used to observe objects that are far away
- 16. to do with the moon
- 17. be able to
- 18. ______ system: our solar system
- 19. a group of solar systems, dust, and gas held together by gravity
Down
- 1. the chemical element consisting of one proton and electron
- 2. ____ model: an exact copy of dimensions/proportions
- 3. having to do with the eye or lenses
- 6. an interstellar cloud made up of hydrogen gas, plasma, helium gas, and dust
- 7. the metric temperature scale
- 8. the transfer of thermal energy
- 9. - occurring in phases, repeating
- 13. a massive ball of gas in outer space that gives off heat, light, and other forms of radiation
- 15. any star around which planets revolve