physics

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Across
  1. 2. the smartest man
  2. 3. a clean alternative to methane, also known as natural gas.
  3. 5. beguining of the universe
  4. 7. relating to the universe or cosmos, especially as distinct from the earth
  5. 8. energy that comes from a source and travels through space at the speed of light.
  6. 9. 8 letter word for outer space
Down
  1. 1. a unit of matter or energy that's the fundamental makeup of all matter.
  2. 3. the reason for our space telescope
  3. 4. the range of all types of EM radiation.
  4. 6. substance composed of subatomic particles that have the mass, electric charge, and magnetic moment of the electrons, protons, and neutrons of ordinary matter but for which the electric charge and magnetic moment are opposite in sign.