Chapter 5

3. the process by which new oceanic crust is formed through volcanic activity and gradual movement of the ocean floor away from a mod-ocean ridge.
4. the process where one tectonic plate moves under another and sinks into the mantle beneath a convergent boundary.
7. hypothesis A theory suggesting the solar system formed from a rotating cloud of gas.
8. A composite diagram representing the complete sequence of rock layers on earth, ordered by age
9. Tectonics Geological concepts explaining the movement of the Earth's plates, including catastrophic events.
11. The theory proposed by Alfred Wegener that Earth's continents were once joined in a single landmass (Pangaea) and have since drifted apart.

1. The principle that in an undisturbed sequence of strata, the oldest layer is at the bottom, and the layers above it are successively younger.
2. the study of the processes that control the structure and properties of the earth's crust and its evolution over time.
5. and Pangaea Referring to a single, massive landmass that existed on Earth millions of years ago.
6. A layer or series of rock or sediment
10. Molten rock material found beneath the earth's surface