Plate Tectonics

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Across
  1. 1. The layer of rock that forms Earth’s outer surface.
  2. 4. The hypothesis that the continents slowly move across Earth’s surface.
  3. 5. The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.
  4. 8. A well-tested concept that explains a wide range of observations.
  5. 9. The material that forms Earth’s hard surface.
Down
  1. 1. A great landmass surrounded by oceans.
  2. 2. A scientist who studies the forces that make and shape planet Earth
  3. 3. The layer of hot, solid material between Earth’s crust and core.
  4. 6. A dense sphere of solid iron and nickel in the center of Earth.
  5. 7. A layer of molten iron and nickel that surrounds the inner core of Earth.