8th Check-in 2 Review: Earth's History

Front

Which fossil is a replica of the original shape of the organism? Options: cast, mold, trace, preserved remains

Back

cast

Front

Which fossil is an impression left by the original organism? Options: cast, mold, trace, preserved remains

Back

mold

Front

Relative dating of rock layers tells us that the deeper we dig, _______.

Back

the older the rocks get

Front

The Geologic Time Scale is a record of what?

Back

the known history of rocks and fossils

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?

Back

preserved remains

Front

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

Back

Sedimentary

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

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

Back

A

Front

Fossils in which minerals replace all, or a part, of an organism is what kind of fossil?

Back

Petrified Fossil