Earth's Layers and Spheres Crossword

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Across
  1. 3. Type of crust that is older and thicker (35 km)
  2. 5. Type of crust that is younger and relatively thin (7 km)
  3. 7. The boundary between the crust and the mantle is called the ________ (use the abbreviation found in the layers of Earth reading)
  4. 8. The part of the Earth's atmosphere that protects us from the Sun's UV radiation
  5. 10. The only planet with life (that we know of)
  6. 11. The sphere of Earth that encompasses all water on Earth
  7. 13. Layer of Earth found below the crust. This layer makes up 82% of Earth's volume
  8. 14. The lower part of the upper mantle where convection currents cause the tectonic plates to move.
  9. 16. Studying ______ allowed us to understand the layers of Earth
  10. 17. The ______ core is liquid and provides the Earth with a magnetic field
  11. 18. The ______ of the Earth is made of an iron-nickel alloy
Down
  1. 1. The sphere of Earth that includes all living things.
  2. 2. The crust and the uppermost portion of the mantle together. This is where the tectonic plates are located.
  3. 4. The percentage of the Earth's water that is NOT salty.
  4. 6. As you go deeper into the Earth temperature, pressure, and density ________
  5. 9. The sphere of Earth that involves all the air on Earth up to 10,000 km above Earth's surface.
  6. 12. The ______ core is solid due to the immense pressure
  7. 15. The part of the Earth's atmosphere where all our weather occurs.