The earth

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Across
  1. 4. The Earth’s movement around the Sun.
  2. 6. It is formed as a result of the Earth’s revolution around the Sun.
  3. 7. The situation experienced on the part of the Earth that does not receive sunlight.
  4. 8. The Earth’s complete turn on its own axis.
Down
  1. 1. The month that lasts 29 days and occurs every four years.
  2. 2. The science that studies the sky and space.
  3. 3. The direction where the Sun sets.
  4. 5. The biggest source of heat and light for the Earth.