Crossword

3. Dominance of reptiles and dinosaurs
5. stress that pulls apart
9. events that occur at the Earth’s surface due to application of natural force
12. a German geophysicist & meteorologist proposed the continental drift theory
14. source of heat
17. upward arch
20. bulk movements of soil, sand, and rock debris.
22. rock is broken down or dissolved into smaller pieces by physical, chemical or biological
23. sedimentary rock strata above and below the surface of erosion is parallel to each other.
25. study of the processes that deform earth’s crust.
26. Process by which rocks are altered in composition, texture, or internal structure by extreme heat
27. used to arrange geological events, and the rocks left behind, in a sequence

1. condition of gravitational and buoyant equilibrium between Earth's lithosphere and asthenosphere
2. plates move away from each other.
4. Internal change in nature
6. stress that causes material to twist
7. Extremely hot liquid located under the earth’s surface
8. Age of mammals
10. plates move towards each other and collide.
11. Includes degradation and aggradation processes.
13. used to determine ages of human fossils and habitation sites
15. Age of “ancient life”
16. layer below the erosional surface is either a metamorphic rock or an igneous rock
18. grinding/sliding action between the plates
19. stress that decreases the volume
21. downward arch
24. Also known as the eon of “hidden life” or Cryptozoic