End of year project part two

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Across
  1. 2. magnetic spectrum wavelength and frequencies
  2. 4. of the universe space time matter energy
  3. 7. cycle The moons different phases coming from sun
Down
  1. 1. revolution Earth spinning on its self and rotating around something else
  2. 3. of the universe Big bang theory
  3. 5. tides Tides caused by gravitational pull from moon
  4. 6. sun Closest star to earth