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

life & earth history

vocabulary

QuestionAnswer
Continental Drift hypothesis stating that continents slowly drift parallel to Earth's surface
Uniformitarianism the idea that Earth's processes are at work today were also working on Earth in the past
Superposition the theory that undisturbed layers rock have the oldest on the bottom and the youngest on the top
Sedimentary Rock rock that is broken down into smaller pieces or that is dissolved in water
Pangaea ancient super continent that began breaking up about 200 million years ago
Plate Tectonics theory that explains how lithospheric plates move and interact, causing major geologic features and events
Fossil Record the history of all known fossils and their placements in the formation of rocks and positions in time
Absolute Dating calculated by using half-life of certain isotopes
Estimation an approximate calculation of quantity
Radioactive Decay when an unstable atomic nucleus changes another nucleus by emitting particle and energy
Igneous Rock rock that forms from magma or lava
Relative Dating age based on objects found at the same site
Half-life the time it takes a given amount of a radioactive isotope to decay to half its original mass
Atoms the smallest unit of matter, a nucleus surrounded by protons and electrons
Index Fossils the fossilized remains of an organism that existed over vast areas for a short period time
Created by: 200410974
Popular 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