Earth History

Front

Types of fossils EXCEPT: Mineral Replacement, Bone neutralization, Carbon Film, Cast and Mold

Back

Bone neutralization

Front

The half-life of Carbon-14 is 5,730 years. How much parent material is left after 5,730 years?

Back

50%

Front

How can the absolute age of an igneous rock be determined?

Back

comparing radioactive isotopes

Front

What is the characteristic of the bottom layer of rock?

Back

the oldest

Front

Index fossils are useful for determining the relative age by ...

Back

a narrow time range and a wide geographic range

Front

In what way are index fossils and layers of ash found in ice cores?

Back

both are used for relative dating

Front

Which time period on the chart was the longest?

Back

Cambrian

Front

Why are trilobite fossils found in Cambrian rocks but not in Triassic rocks?

Back

Trilobites went extinct before the Triassic rocks.

Front

Ice cores are most useful for determining

Back

the atmospheric composition of the past

Front

Which layer of rock is most likely the youngest? Options: A, D

Back

A