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

Unit 3 word list 4

8th grade mr. Hardy

QuestionAnswer
Eon Longest subdivision in the geologic time scale that is based on the abundance of certain types of fossils and is subdivided into eras
Epoch Next smaller division of geologic time scale is subdivided into periods is characterized by differences I life forms that may very regionally
Era Second longest division in geologic time is subdivided into periods and is based on major worldwide changes in types of fossils
Geologic time scale Divisions of earths history into time units based largely on the types of life forms that lived only during certain periods.
Natural selection Process by which organisms that are suited to a particular environment are better able to survive and reproduce then organisms that are not
Organic evolution Change of organism over geologic time
Pangea Large ancient land mass that was composed of all the continents joined together
Period Third longest division of geologic time is subdivided into epochs and is characterized by the types of life that existed worldwide
Species Group of organism that reproduces only with other members of their own group
Trilobite Organism with a three-lobed exoskeleton that was abundant in Paleozoic oceans and is considered to be an index fossil
Created by: asimien907
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