Across
- 4. the large, dark, flat areas on the Moon
- 5. a large deposit of sediment that forms where a stream enters a large body of water
- 6. the boundary between two plates that move away from eachother
- 8. a measurement of a liquid's resistance to flow
- 12. a naturally occurring,inorganic solid with chemical composition and an orderly arrangement of atoms or ions
- 13. a member of the mineral group that has silicon and oxygen in its crystal structure
- 14. a hot, dense, slowly cooling sphere of carbon
- 15. an enormous explosion that destroys a star
Down
- 1. grooves in solid rock formations made by rocks that are carried by glaciers
- 2. an instrument that spreads light into different wavelengths
- 3. the greatest tidal range that occurs when the Earth, the Moon, and the Sun form a straight line
- 7. the atmospheric layer closest to Earth's surface
- 9. a graphical illustration of seismic waves
- 10. a pile of angular rocks and sediment from a rockfall
- 11. the grinding away of rock or other surfaces as particles carried by wind, water, or ice scrape against them