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

Weathering

TermDefinition
Weathering Decomposition and disintegration of rocks in situ
Decomposition Involves chemical weathering or rocks creating new materials with a changed mineral structure
Disintegration Involves mechanical weathering of rocks creating smaller fragments of the same type and occurs in desert areas where there is a large temperature range therefore expanding during day, and contraction at night
Freeze-Thaw Weathering When water in joints freezes at 0 degrees, then expands by 10% which prises open rocks
Pressure Release Overlying rocks suddenly removed cause underlying rocks to expand and fracture parallel to the surface
Hydration Certain minerals absorb water, expand and then change into other (weaker) minerals
Plant Roots Fill cracks in rocks and cause pressure to be exerted on the rock
Animal Erosion Burrowing animals can dislodge rock fragments to the surface, exposing them to chemical, physical and biological weathering
Hoff's Law The rate of chemical weathering increases two or three times for every 10 degree increase in temperature (up to 60 degrees)
Rock Type Influences the rate and type of weathering due to chemical composition and vulnerability to chemical weathering processes and the presence of vertical or horizontal bedding planes representing lines of weakness
Frost Wedging [Physical] Water seeps into a crack in a rock. When the water freezes it expands and pushes and cracks the rock.
Exfoliation [Physical] Sheets of rock fall/slide off of an exposed rock and can cause a rock hill.
Thermal expansion and contraction [Physical] Heat causes the rock to contrast and when night comes the temperature becomes colder and that causes the rock to expand. This contrasting and expansion causes the rock to break off.
Crystal growth [Physical] Salt-water rain gets into fractures in a rock and when the water evaporates the salt stays and expands causing the rock to break.
Tree root growth [Physical] The tiny ends of tree roots grow into fractures of a rock and when the roots grow it causes the fractures to get bigger and the rock breaks.
Abrasion [Physical] Rocks are pulled down a mountain or a hill and they hit hit other rocks and cause them to break.
Dissolution [Chemical] Some chemicals in rocks are dissolved by water. In limestone calcite is easily dissolved by water thus forming caves.
Oxidation [Chemical] Rust is the commonly know word for oxidation. Iron, a common example, when mixed with water it gains a reddish stain.
Hydrolysis [Chemical] Water reacts with feldspar and it changes into clay causing the surrounding rock to break off.
Lichens [Biological] Combinations of fungi and algae live on rocks and slowly eat away at the surface of the rock.
Popular Social Studies 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