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

Fossils 709 7A

Fossil Facts

Fossils remains,imprints,or traces of phestoric orginsms that can tell when and where orginsms once lived and how they die.
Permineralized Remains Fossils in which the spaces inside are filled with minerals from groundwater.
Carbon Film thin film of carbon residue preserved as a fossil.
Mold a type of body fossilthat forms in rock when an orginism with hard parts is buried, decays or disolvesand leaves a cavity in the rock.
Cast a type of body fossil that forms when crystals fill a mold or sedimentgs wash into mold and harden into rock
Indext Fossil remains of species that existed on earth for a relatively short period of time, were abudent and wide spreadgeographically,and can be used by geoligest the ages of rock layers.
Principle Of Superposition state that is undisturbed rock layers , the oldest rock are on younger towared the top.
Relative Age the age of something compared with outher things.
Unconformity gap in the rock layer that is due to erosion or period without any deposition.
Absolute Age age, in years of rock or other object can be determined by using propoerties by using properties of the atoms that make up materials.
Radioactive Decay processing which some isotopes break down into other isotopes and perticles.
Half-life time it takes for half of the atoms of an isotope to decay.
Raidometric Dating Process used to calculate absolute age of rock by measuring the raito of parent isotope to daughter product in a minnerial and Knowing the half life