Review of Vocabulary

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Across
  1. 3. This is the third planet from the sun. It is the only planet that we know has life.
  2. 5. A circular path that an object takes around another object. For example, the moon _____ around the earth.
  3. 6. The rise and fall of the level of the oceans twice every day.
  4. 7. Objects that are in space and are made of gas. They look like points of light in the sky.
  5. 9. Rain and snow that form in the atmosphere through condensation and fall to the earth.
  6. 10. This is a natural satellite of the earth. It is made of rock.
Down
  1. 1. The magnetic force of attraction that holds planets in orbit around the sun. It also holds the moon in orbit around the earth.
  2. 2. Transformation from gas into liquid
  3. 3. Transformation from liquid into gas
  4. 4. The layer of gases that cover the earth.
  5. 8. This is the only star in our solar system. It is made of gas and gives light and heat.