Across
- 3. The slow movement of continents over Earth’s surface
- 4. The atmospheric layer where most weather occurs
- 6. A solid, dense layer at Earth’s center
- 9. Gases that trap heat in Earth’s atmosphere
- 11. High-energy particles coming from space
- 13. The theory that explains plate movement, earthquakes, and volcanoes
- 14. A long period of colder global temperatures
Down
- 1. The process that creates new ocean crust at mid-ocean ridges
- 2. The atmospheric layer containing the ozone layer
- 5. A method used to determine the age of rocks using radioactive decay
- 7. Waves that travel through Earth during earthquakes
- 8. A switch in Earth’s magnetic north and south
- 10. The wearing away of rock by wind, water, or ice
- 12. A liquid layer of melted metal beneath Earth’s mantle