Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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

8Sci CH15

8th Science CH15 Moving Continents

asthenosphere putty-like layer in Earth’s crust on which plates slide around; capable of flow
continental drift hypothesis first proposed by Wegener that Earth’s continents were once a single super-continent called Pangea, which broke into smaller land masses about 200 million years ago and have since moved apart to form present-day continents
convergent boundary boundary between two lithospheric plates colliding; Earth’s most famous volcanoes occur at convergent plate boundaries
divergent boundary boundary between two lithospheric plates moving away from each other resulting in magma being forced upward to the continental or oceanic crust, where it erupts as lava and forms new crust; mid-ocean ridges are divergent boundaries
hot spots areas of Earth’s mantle that are hotter than others; as lithospheric plates move over hot spots, magma is forced up through cracks in the lithosphere, where it erupts as lava and volcanoes build up; the islands of Hawaii were formed in this manner
lithosphere Earth’s rocky crust and solid, uppermost part of the mantle; all the oceans and continents of Earth move slowly over the asthenosphere on lithospheric plates
plate tectonics geologic theory accounting for the movement of the continents, suggesting that the solid plates of the lithosphere are moved slowly by convection currently originating deep inside Earth
sea-floor spreading occurs when plates beneath the ocean floor pull apart and magma from Earth’s mantle is forced upward at mid-ocean ridges where it cools and forms a new seafloor
transform fault boundary boundary formed when two plates slide past each other in the same direction at different speeds or slide past each other in opposite directions; the San Andreas fault Is a transform fault boundary