Across
- 3. A supercontinent that existed about 300 million years ago when all of Earth’s land was joined together.
- 4. The scientific theory that Earth’s outer layer is broken into plates that move and interact, shaping Earth’s surface.
- 6. A large, flat area of land that is higher than the land around it.
- 8. Areas where one tectonic plate sinks beneath another plate into the mantle.
- 11. A deep, narrow valley with steep sides, usually carved by a river over millions of years.
- 12. The solid, extremely hot center of Earth made mostly of iron and nickel.
- 14. Tall landforms that rise sharply above the surrounding land, usually with steep sides and high peaks.
- 15. Tectonic plates that move toward each other.
- 16. Low areas of land, often shaped like a bowl, where water may collect.
- 19. A sheltered body of water where ships can anchor safely.
- 21. Flat, low-lying land found along the coast next to the ocean.
Down
- 1. Dry regions that receive very little rainfall and have sparse plant life.
- 2. An underwater mountain range formed where tectonic plates move apart and magma rises to create a new ocean floor.
- 5. Broad, flat or gently rolling areas of land with very little change in elevation.
- 7. The liquid layer surrounding the inner core, made of molten iron and nickel that helps create Earth’s magnetic field.
- 9. Tectonic plates that move away from each other.
- 10. Tectonic plates that slide past each other horizontally.
- 13. The rigid outer layer of Earth, made up of the crust and upper mantle.
- 16. A body of water partly enclosed by land but open to the sea.
- 17. A narrow body of water that connects two larger bodies of water.
- 18. The thick layer inside Earth between the crust and the core, made of semi-solid, slowly flowing rock.
- 20. Vibrations that travel through Earth during an earthquake.