Across
- 4. Seismic waves that travel only through solids
- 7. Method using three stations to locate an earthquake’s epicenter
- 8. Liquid layer surrounding the inner core that helps create Earth’s magnetic field
- 9. How tightly matter is packed into a given volume
- 10. Fast seismic waves that can travel through solids, liquids, and gases
- 12. Thinner, more dense crust found beneath the oceans
- 14. Process where unstable atoms break down and release heat over time
- 16. Thick layer beneath the crust made of hot rock that can slowly flow
- 17. Process where liquid iron freezes into solid iron, releasing heat
- 19. Solid, extremely hot center of Earth
- 21. Waves of energy released by earthquakes that travel through Earth
- 22. Heat leftover from Earth’s formation
- 23. Movement caused by differences in temperature and density
- 24. Invisible force surrounding Earth that helps protect it from solar radiation
- 25. Heat stored inside Earth that drives internal processes
- 26. Rigid outer layer made of the crust and uppermost mantle
Down
- 1. Area where certain seismic waves are not detected
- 2. Point on Earth’s surface directly above an earthquake
- 3. Region around Earth controlled by its magnetic field
- 5. Energy from the Sun that travels through space
- 6. Recorded graph of seismic wave motion
- 11. Time it takes for half of a radioactive substance to decay
- 13. Thicker, less dense crust that makes up the continents
- 15. Earth’s thin, outermost layer
- 18. Circular movement where warm material rises and cool material sinks
- 20. Soft layer of the upper mantle that allows tectonic plates to move