Science

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Across
  1. 1. An idea or explanation that you then test through study and experimentation
  2. 3. The rate at which someone or something is able to move or operate.
  3. 5. A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms
  4. 9. The variable that does not depend on the other
  5. 10. The displacement of spectral lines toward longer wavelengths in radiation from distant galaxies and celestial objects
  6. 12. The variable that changes or depends on the other
Down
  1. 2. Includes radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays
  2. 4. Usually grouped into three main groups: igneous, metamorphic and sedimentary
  3. 6. All existing matter and space considered as a whole
  4. 7. A naturally occurring solid material from which a metal or valuable mineral can be profitably extracted
  5. 8. Substances that are formed naturally in the Earth
  6. 11. Strength or energy as an attribute of physical action or movement