Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
chapter 3 ES
| Term | Definition |
|---|---|
| continental drift | the hypothesis that continents slowly move across earth's surface |
| Pangaea | the name of the single landmass that began to break apart 200 million years ago and gave rise to today's continents |
| fossil | the preserved remains or traces of an organism that lived in the past |
| mid-ocean ridge | an undersea mountain chain where new ocean floor is produced; a divergent plate boundary |
| sea-floor spreading | the process by which molten material adds new oceanic crust to the ocean floor |
| deep-ocean trench | a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle |
| subduction | the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary |
| plate | a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of the continental and oceanic crust |
| divergent boundary | a plate boundary where two plates move away from each other |
| convergent boundary | a plate boundary where two plates move toward each other |
| transform boundary | a plate boundary where two plates move past each other in opposite directions |
| plate tectonics | the theory the pieces of earth's lithosphere are in constant motion, driven by convection currents in the mantle |
| fault | a break in earth's crust along which rocks move |
| rift valley | a deep valley that forms where two plates move apart |
Created by:
user-1975233