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

Sekas Chapter 5

Chapter 5 Vocabulary

TermDefinition
relative age the age of rocks and geologic features compared with other rocks and features nearby
superposition the principle that in undisturbed rock layers, the oldest rocks are on the bottom
principle of original horizontality the principle that rock-forming materials are deposited in horizontal layers
principle of lateral continuity the principle that sediments are deposited in large, continuous sheets in all directions until they thin out or meet a barrier
inclusion a piece of an older rock that becomes part of a new rock
principle of cross-cutting relationships the principle that if one geologic feature cuts across another feature, the feature that it cuts across is older
unconformity a surface where rock has eroded away, producing a break, or gap, in the rock record
correlation matching rocks and fossils from separate locations
fossils the preserved remains or evidence of ancient living things
index fossils representatives of species that existed on Earth for a short length of time, were abundant, and inhabited many locations
absolute age the numerical age, in years, of a rock or an object
atom the smallest part of an element that has all the properties of the element
isotopes atoms of the same element that have different numbers of neutrons
radioactive decay the process by which an unstable element naturally changes into another element that is stable
half-life the time required for half of the parent isotopes to decay into daughter isotopes
radiometric dating the process by which scientists measure the amount of parent isotope and daughter isotope in a sample of material to determine its age
Created by: brandi.sekas
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