Unit Exam Review pt.3

Front

According to the diagram, the fossils in which layer are the youngest?

Back

D

Front

What is the age of Earth?

Back

4.6 billion years old

Front

Arrange the divisions of geologic time from longest to shortest: eon, era, period, epoch.

Back

eon > era > period > epoch

Front

What is used as evidence to construct the geologic time scale?

Back

All of the above: fossils, radiometric age data, comparative studies of different rock sequences.

Front

oldest layer of rock is at the bottom in sedimentary rock layers

Back

law of superposition

Front

Older rocks and fossils tend to be at the...

Back

Bottom

Front

The time required for half of the parent isotope to decay into daughter isotopes.

Back

Half-life

Front

The age of rocks and geologic features compared with other rocks and features nearby.

Back

Relative Age

Front

Average numerical age, in years of a rock or object.

Back

Absolute Age

Front

Represent species that existed on Earth for a short length of time, were abundant and inhabited many locations.

Back

Index Fossils