Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

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 email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

The Age of The Earth

Use this to study our Unit on the Age of The Earth and The Geologic Time Scale

What law do we apply that tells us that the layers of rock on the bottom of a sequence of rock layers are the oldest? The Law of Superposition
By examining the above rock layers and comparing one rock layer to the next to get the general age of the rock is called what relative age
If scientists wanted to get the exact year of the rock or fossils found within the rock layers they would use? radiometric dating
Earth is about how old? 4.6 billion years old
Dinosaurs went extinct about how many years ago? 65 million
The theory that the same forces that are shaping our Earth now were shaping our Earth in the past is known as: The Law of Uniformitarianism
The amount of time it takes for ½ a sample of radioactive element to decay into another form Half life
Which era were the dinosaurs around in? Mesozoic
What were the predominant features of the Paleozoic Era? Invertebrates
What event is thought to have wiped out the dinosaurs? Meteroid
Why do we think a meteroid wiped out the dinosaurs? Becuase radioactive elements that are normally only found in space are found in rocks layers that are 65 million years old.
Created by: stacylatham