Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

8th grade science

QuestionAnswer
What is the crust of the earth? It is the outermost layer of the earth.
What are the two types of crust? Continental and the oceanic
What is the Continental Crust? Makes up the continents
What is the Oceanic Crust? It is under the ocean floor
What is the mantle? Just beneath the crust is the mantle. It is more dense than the crust.
What is the mantle made of? The rocks that make up the mantle are partially melted and flow like a very thick liquid.
Isostasy The balance between the downward force of the crust and the upward force of the mantle Iso- equal stasy- standing still
fossil the preserved remains of an ancient organism
How are fossils beneficial? Fossils give geologists an idea of the type and abundance of living organisms for a period of time
Theory of Continental Drift the continents were once joined together and have since drifted apart.
Pangaea A single, giant landmass that was made of all the continents put together.
Evidence for Continental Drift 1. Fossils 2. Rocks 3. Shape of the Continents
What is the Mid Ocean Ranges? a large system of underwater mountains that run throughout the ocean floor.
how are continents able to drift? Ocean Floor Spreading
What is Ocean Floor Spreading? as either side of the ridge moves apart, lava escapes from the mantle and solidifies to form new rocks.
What is Magnetic Evidence? Some minerals have magnetic properties and align themselves with the Earth’s magnetic poles when they form. As these rocks move, their alignment with the poles moves.
What does Magnetic Evidence provide or prove? This provides a record of plate movement patterns and rates.
What are Trenches? a deep, V-shaped valley on the ocean floor where old ocean floor sinks into the mantle
What is subduction? The process where the crust plunges back into the mantle
What is the Theory of Plate Tectonics? the Earth’s surface consists of several plates that are in constant motion. This idea links the theory of continental drift and ocean-floor spreading.
What is the Lithosphere? The outermost solid part of the Earth.
What is the Lithosphere made of? This is made of a number of plates of crust floating on top of the mantle rock. Plates often contain both continental and oceanic crust.
How many major Lithosphere plates are there? 7
What is a plate boundary? The junction between 2 plates
What are the three types of plate boundaries? 1. Divergent: move apart 2. Convergent: move together 3. Transform Boundary:grind
What is a convection current? The movement of materials caused by differences in temperature. As heat from the core rises to the crust, it pushes the plates outward, causing tectonic movement.
What is deformation? The breaking, tilting, and folding of rocks due to stress.
What are the 3 types of stress? 1. Compression: squeezed together 2. Tension: pulled apart 3. Shearing: pulled in opposite directions
What are the 2 kinds of folds in bedrock? 1. anticline: upward fold 2. syncline: a downward fold
What is a fault? A break or crack along which rocks move. Rocks on one side of the fault slide past rocks on the other side.
What are the 4 kinds of faults? 1. Normal Fault: tension, fault moves up, the other moves down. 2. Reverse Fault: compression, one sidemoves up on the other side. 3. Thrust Fault: compression, one side of the fault slides up. 4. Lateral Fault: shearing, both sides slide past eac
What is a rift valley? when a section of rock between 2 normal faults slides down. (Ex. Death Valley)
What is a plateau? A large, flat section of land that is raised high above sea level Example: Grand Canyon
Created by: shann1
Popular Earth Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards