Across
- 3. chunk of rock and metal in outer space that is in orbit around the Sun; smaller than the moon;
- 6. third planet from the sun; has an atmosphere that protects life and surface temperatures that allow water to exist as a solid, liquid, and gas; our home
- 8. a collection in outer space composed of gas or dust that forms after a star explodes
- 10. giant spheres of super hot gas made up mostly of hydrogen and helium; give off electromagnetic radiation (light)
- 12. lumps of ice, dust, and rock that orbit the Sun
- 13. planet a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as a planet
- 14. radiation that moves through space from one object, like a star, to another; carried by electromagnetic waves
- 21. a disturbance that travels through space and matter transferring energy from one place to another; does NOT transfer matter
- 22. unit (AU) distance between Earth and the Sun
- 23. the number of complete wavelengths that pass a point in a given time (for example, per second); this is higher in shorter waves, like gamma
- 24. Any object that orbits around another object in space; can be natural (moons) or manmade (International Space Station)
- 25. the transfer of energy from electromagnetic waves
Down
- 1. A danger or risk, especially caused by high frequency (short wavelength) radiation, like x-ray or gamma
- 2. A metric unit of length equal to 1000 meters
- 4. system made up of the Sun and all the planets, asteroids, and other objects that orbit the Sun
- 5. spectrum range of energy waves that have both an electric and magnetic field; these energy waves can be called "radiation" or "light"; different types of waves have different uses and functions in our everyday lives; how a wave is used depends on its wavelength and frequency
- 7. (hierarchy) The order or ranking of things; can be based on size
- 9. made of billions of galaxies, which are made of billions of stars
- 11. an instrument used to see objects that are far away; often used to view astronomical bodies through magnification (zooming in) or by using different forms of electromagnetic radiation (light)
- 15. collection of billions of stars (and the bodies that orbit those stars) that slowly orbit around a center of high gravity
- 16. a rocky or gaseous object that orbits a star; is large enough to have a round shape because of its own gravity, and has cleared the area of its orbit
- 17. A force (pull) of attraction between objects that is due to their masses
- 18. the distance light travels in one year; used to measure distances that are outside of our solar system
- 19. The distance between two corresponding parts of a wave; often the distance between two crests or two troughs
- 20. A natural satellite that revolves around a planet