Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards




share
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

Plate Tectonics

QuestionAnswer
what is the core made of? nickel and iron
The mantle has 3 layers, what are they? lower mantle, asthenosphere and litosphere
Where is the litosphere? the upper mantle and crust combined
What is the boundary where the upper mantle meets the crust moho discontinuity line
what is sial found in the continental crust in rocks like granite which is rich in the minerals silica and aluminium
what is sima in the oceanic crust eg basalt is rich in silica and magnesium
who made up the theory of continental drift? Alfred Wegner
Who made up the theory of convection currents? Arthur Holmes
who made the theory of seafloor spreading? Harry hess
Proof of continental drift Coastlines fit together like a jigsaw Matching plant fossils were found in South america and Antarctica
Whats subduction? The sideways or downwards movement of the edge of a plate into the mantle underneath another lighter plate
How many plates are there? 7
Name 3 plates The north american plate, nazca plate and eurasian plate
Created by: Megan k