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
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

18weekassessment

TermDefinition
igneous rock formed when magma cools and hardens
magma magma forms when rock melts
crystalline full of crystals
intrusive magma cools below ground; larger crystals
extrusive magma cools above ground
coarse-grained generally light colored with dark crystals spread throughout
fine-grained small grains invisible to the human eye
porphyritic rock with a mix of large and small crystals; granite is an example
glassy few or no crystals; obsidian is an example
vesicular many holes inside and outside; pumice is an example
felsic rich in minerals that form feldspar and quartz
mafic contains a group of dark colored minerals
compaction sediment progressively loses its porosity due to the effects of loading
chemical sedimentary rock formed when minerals, dissolved in water, begin to precipitate out of solution and deposit at the base of the water body
organic sedimentary rock contains significant amounts of organic carbon
clastic sedimentary rock form by weathering processes which break down rocks into pebble, sand, or clay particles by exposure to wind, ice, and water
sorting the tendency for currents of air or water to separate sediments according to size
cementation hardening and welding of clastic sediments by the precipitation of mineral in the pore spaces
angularity used to describe the shape of the corners on a particle of sediment
stratification the layering of rocks
cross-bedding horizontal units that are internally composed of inclined layers
ripple marks sedimentary structures and indicate agitation by water or wind
mud cracks when muddy deposits dry and shrink
concretions lumps of rock that have a composition that is different from that of the main body
Created by: kaeleidavis
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