Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

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.

Remove ads
Don't know
remaining cards
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:
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

Geological Time 8

vocabulary practice

Geology a science that deals with the history of the earth as recorded in rocks
absolute age the age of a rock given as the number of years since the rock formed
era a major division of geological time
eon the longest division of geological time
fauna animal life; animals of a particular region or period
flora plants of a region or era
fossil record a historical sequence of life indicated by fossils found in layers of the Earth's crust
geological time scale A time scale established by geologists that reflects a consistent sequence of historical periods, grouped into four eras: Precambrian, Paleozoic, Mesozoic, and Cenozoic.
law of superposition in a sequence of sedimentary rocks, the oldest rocks are on the bottom and the younger rocks are on the top
period a unit of geological time during which a system of rocks formed
radiometric dating using a radioactive process to determine the age of an item
relative age the age of rock compared to the ages of other rocks
Created by: amyshirey