Geologic Time

Front

The Geologic Time Scale is a record of what?

Back

the known history of rocks and fossils

Front

Which of the following statements about the fossil record is true? Options: all organisms become fossils, organisms having soft body parts make up most of the fossils, all organisms that have shells become fossils, the fossil record is incomplete

Back

the fossil record is incomplete

Front

The Law of Superposition helps scientists to determine what?

Back

The relative age of rock layers

Front

A scientist who studies fossils is called a what?

Back

Paleontologist

Front

How old do Paleontologists believe the Earth is?

Back

4.6 billion years old

Front

A bug stuck in amber is an example of what type of fossil? (Options: cast, mold, trace, preserved remains)

Back

preserved remains

Front

What type of rock do fossils form in? Options: Igneous, Sedimentary, Metamorphic, Classic

Back

Sedimentary

Front

According to the law of superposition, which layer is the youngest?

Back

A

Front

Why is the fossil record incomplete?

Back

fossils get eroded away over time, most organisms never became fossils, scavengers and decomposers eat them too quickly

Front

Paleozoic, Mesozoic & Cenozoic are all

Back

Eras