Geologic history of earth review

Front

What do scientists study to help determine the geologic history of the Earth?

Back

Fossil record

Front

How many billion years is the history of Earth?

Back

4.6 billion

Front

In which layer of the fossil record are the oldest fossils found?

Back

Bottom layer

Front

What is the preserved remains or trace of an organism called?

Back

Fossil

Front

What are the sedimentary layers of rock in Earth called?

Back

Rock strata

Front

What is the study of rock layers and layering?

Back

Stratigraphy

Front

What type of record helps scientists understand the relative ages of rock layers?

Back

Relative record

Front

What is the term for the age of rocks or fossils in years?

Back

Absolute age

Front

What do fossils provide evidence of?

Back

Past life forms and environments

Front

What is the process called when sedimentary rock layers are formed?

Back

Sedimentation