Vocabulary words

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Across
  1. 4. A scientist who studies the chemical composition of the earth's rocks and minerals.
  2. 6. The study of the physical features of the earth's surface.
  3. 8. Relating to the physical properties and processes of the earth.
  4. 9. All the water on the earth's surface.
Down
  1. 1. The envelope of gases surrounding the earth.
  2. 2. Representing the earth as the center, as in former astronomical systems.
  3. 3. Shaped like a sphere or ball.
  4. 5. The parts of the universe habitable by living organisms.
  5. 7. A half of a sphere.
  6. 8. The science which deals with the physical structure and substance of the earth.