Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
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

7.1, 7.2

TermDefinition
eon the longest unit of geologic time
era a large division of geologic time, but smaller than an eon
period a unit of geologic time smaller than an era
epoch a division of geologic time smaller than a period
mass extinction the extinction of many species on Earth within a short period of time
land bridge a landform that connects two continents that were previously separated
geographic isolation is the separation of a population of organisms from the rest of its species due to some physical barrier, such as a mountain range or an ocean
Paleozoic era is the oldest era of the Phanerozoic eon
Mesozoic era is the middle era of the Phanerozoic eon
Cenozoic era is the youngest era of the Phanerozoic eon
inland sea is a body of water formed when ocean water floods continents
coal swamp is an oxygen-poor environment where, over time, plant material changes into coal
supercontinent is an ancient landmass which separated into present-day continents
Created by: grupeabi2506