Solar Radiation

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Across
  1. 1. At this point, light entering hits the surface obliquely.
  2. 4. ________ are primarily determined by Earth's inclination on its axis.
  3. 6. The sun's rays hit vertically on the ________.
  4. 7. During this half of the year (March 21-Sept. 22), the _________ tilts towards the sun.
  5. 8. Without the sun's energy, the temperature would reach _________.
  6. 9. About 31% of the solar radiation on Earth is refelcted by _______.
Down
  1. 1. creatures that absorb the sun's energy
  2. 2. The sun's energy is a product of a ________ reaction.
  3. 3. makes life possible on Earth
  4. 5. the proportional reflectance of Earth's surface