Fossils, Relative & Absolute Age Dating Test

Where are the oldest rocks located according to the principle of superposition?

At the bottom

When 1 half life occurs, what percent parent material will you have left?

50%

When 2 half lives occur, what percent daughter material will you have?

75%

If the half-life of Lithium-9 is 2 seconds, how many half lives will have occurred after 8 seconds?

4

What makes a fossil a trace fossil?

If it shows signs of activity

True or false: A dinosaur footprint is a trace fossil.

True

What type of rock would you most likely find fossils?

sedimentary

An unconformity between tilted rocks and horizontal rocks is known as what?

angular unconformity

What person studies fossils?

paleontologist

Assigning exact ages to rocks is known as what kind of age dating?

absolute

Stating rock A and older than rock B is using which kind of age dating?

relative

Rock A cuts across rock B, which rock unit would be OLDER?

rock B

Rock unit A is above rock unit B, which would be YOUNGER?

rock A

Which unconformity forms between two sedimentary rocks?

disconformity

The half-life of a radioactive isotope is 10 years. A bottle contains 200g of that isotope, how much of the radioactive isotope would be left after 20 years?

50g

Is it possible to use radiometric dating on sedimentary rocks?

No

Which parts of an organism will become preserved the easiest?

the hard parts

When a leaf is fossilized in rock, what type of preservation is this?

carbon film

Which organism is most likely to be found fossilized in ice?

woolly mammoths

Which organism is most likely to be found fossilized in tar pits?

saber-toothed cats

What is fossilized tree sap?

Amber