eoc prep 4

How many mass extinctions have there been in Earth's history?

What evidence for dinosaur extinction by asteroid impact is found in soil layers?

The oldest specimen that can be dated using Carbon-14 is about 

A fossil used to date a rock layer it is in is called an 

Warming of Earth's atmosphere due to increased concentration of gases such as CO₂ and methane?

The body of an animal is more likely to become fossilized if it

Which gas protects Earth's surface by filtering out harmful ultraviolet radiation?

Which best defines the natural greenhouse effect?

Which of the following provides evidence of past climate conditions on Earth?

Sedimentary rock layers are deposited with youngest on the top and the oldest on the bottom.

a cavity left in an organism's form when an organism dies, is buried, & its flesh & bones decay

A substance has 32 atoms of parent isotope after 3 half-lifes, how many would it have after 5?

The 4 major divisions of geologic time in order are

The increase in average temp. of atmosphere and ocean by increased conc. of atmospheric gases

Which gas protects Earth's surface by filtering out harmful ultraviolet radiation?

The first living organisms to produce oxygen on Earth were

To be considered a fossil by paleontologists the remains must be at least

Dating a rock layer by determining the age of the layers above and below it is

Why aren't radiometric dating techniques applied to sedimentary rocks?

Which of the following would be considered a fossil?

If Earth's entire history was represented by one year, modern humans would appear