Earth's History & Geologic Time Review

Front

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

Back

A

Front

Which division on the geologic time scale is the shortest? Options: epoch, era, eon, period

Back

epoch

Front

How old do Paleontologists believe the Earth is?

Back

4.6 billion years old

Front

Most events on the geologic timeline happened:

Back

more recently, near the modern time

Front

Which of the following questions can be answered by studying these fossil layers?

Back

Which organisms lived before/after/or at the same time?

Front

When scientists use logic to determine the age of one fossil compared to another, they use this type of dating.

Back

Relative

Front

Scientists chose where units of geologic time began and ended based on major changes in life forms at certain times.

Back

true

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

The Geologic Time Scale is a record of what?

Back

the known history of rocks and fossils

Front

Which is the correct order of geologic time? Options: Era > Eon > Period > Epoch, Eon > Era > Period > Epoch, Epoch > Period > Era > Eon, Era > Eon > Epoch > Period

Back

Eon > Era > Period > Epoch