Astronomy Vocabulary List:
1. galaxy
2. revolution
3. rotation
4. precession
5. nutation
6. barycenter
7. ellipse
8. Doppler Effect
9. fusion
10. tilt
11. geocentric
12. heliocentric
13. retrograde motion
14. astronomical unit
15. solar wind
16. sunspot
17. continuous spectrum
18. absorption spectrum
19. emission spectrum
20. absolute magnitude
21. apparent magnitude

Rocks, Soils, and Weathering Vocabulary List:
1. intrusive igneous rock
2. extrusive igneous rock
3. magma
4. lava
5. clastic sedimentary rock
6. chemical sedimentary rock
7. weathering
8. erosion
9. deposition
10. compaction
11. cementation
12. strata
13. foliated metamorphic rock
14. nonfoliated metamorphic rock
15. mechanical weathering
16. chemical weathering
17. soil
18. slope stability
19. mass movement
20. mitigate