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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

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.

Remove ads
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


Sea-floor spreading

Sea floor spreading? When molten material rises from mid-ocean ridges to create a new oceanic crust
What happens to old oceanic crust as new molten material rises from the mantle? Sinks into deep ocean trenches
Subduction? Molten material is hot, spreads then becomes cool, dense & sinks
Sonar? A device scientists use to map the ocean floor
Mid-ocean ridge? A chain of underwater mountains along which sea floor spreading occurs
Divergent? < > two plates carrying oceanic crust collide
Convergent? > < two plates carrying continental crust collide
Transform? ^ ¥ a plate carrying oceanic crust collides with a plate carrying continental crust
Created by: Sammi29