Planet Earth and Beyond

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Across
  1. 1. The second planet from the Sun, often referred to as Earth's "sister." (5 letters)
  2. 3. The layer of Earth made of the solid upper mantle and crust. (4 letters)
  3. 4. The planet closest to the Sun, known for its extreme temperatures. (4 letters)
  4. 8. The layer of Earth that is liquid and composed mainly of iron and nickel. (6 letters)
  5. 9. The fourth planet from the Sun, known for its red appearance. (4 letters)
Down
  1. 2. The planet is famous for its beautiful rings. (6 letters)
  2. 5. The third planet from the Sun, home to life. (5 letters)
  3. 6. The dense inner part of Earth, which is solid and mostly iron. (5 letters)
  4. 7. The largest planet in our solar system, known for its Great Red Spot. (7 letters)