Busy. Please wait.
or

Forgot Password?

Don't have an account?  Sign up 
or

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.

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


Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

Physical geography

Revision sa1

TermDefinition
Crust Material beneath the ocean and continents
Core Most inner part of the Earth. Iron and nickel
Mantle Semi molten rock and magma. Beneath the crust
Lithosphere Upper part to the mantle
Asthenosphere Below the lithosphere, Plates lay on it
Sial Made from silica and aluminium, Oceanic
Sima Made from silica and magnesium, Continental
Plates Collide, separate and grind by one another. Floats on top of asthenosphere
Convection currents Allows the plates to move, currents in the mantle caused by the heat of the core
Divergent boundary Constructive, when plates move away from each other
Convergent boundary Destructive, two plates collide with each other, Subduction can occur
Transform boundary Plates move along side one an other at different speeds
Subduction When one plate is sunk beneath another one due to the heavier plate being pushed on top by convection currents
Fault line Where two plates meet each other
Active volcano Erupts regularly
Dormant volcano Has not erupted in 100s of years
Extinct volcano Has never erupted in historical times
Vent Opening of the earths surface
Crater Opening of the volcano
Basic lava Low in silica, Runny
Acidic lava High in silica, Thick like honey
Lahar Mud flow cause when lava melts snow off a mountain
Intrusive Underneath the surface
Extrusive Above the surface
Hot spot Areas of mantle under the crust, Like a blister
Fissure Long crack in the crust
Laccolith Intrusive, dome-like structure
Sill Horizontal sheets of volcanic rock that cooled beneath the crust
Dyke Thin vertical sheets of volcanic rock that runs parallel to rock strata
Focus Where earthquakes occur
Epicentre Above the focus
Tsunami Giant wave caused by an earthquake beneath the ocean
Created by: daphandrea