Fossils and Geologic Time

Front

What is the Half Life of Californium 252?

Back

The Half Life of Californium 252 is not 5 years; it is approximately 2.645 years.

Tags

NGSS.HS-PS1-8

Front

In what type of rock do fossils typically form?

Back

Fossils typically form in sedimentary rock.

Front

What is an index fossil?

Back

An index fossil is a fossil that is used to define and identify a particular time period in the geologic time scale.

Tags

NGSS.MS-ESS1-4

Front

How old do Paleontologists believe the Earth is?

Back

Paleontologists believe the Earth is approximately 4.6 billion years old.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Front

What is the absolute age of a fossil?

Back

The absolute age of a fossil is the actual age of the fossil in years.

Front

What is relative age?

Back

Relative age is the age of a rock or fossil in comparison to other rocks or fossils.

Tags

NGSS.MS-ESS1-4

Front

What type of rock is formed from cooled magma or lava?

Back

Igneous rock is formed from cooled magma or lava.

Front

What is the difference between absolute age and relative age?

Back

Absolute age is the exact age of a rock or fossil, while relative age is its age compared to other rocks or fossils.

Front

What is the significance of index fossils in geology?

Back

Index fossils help geologists determine the relative ages of rock layers and correlate them across different regions.

Tags

NGSS.MS-ESS1-4

Front

What are the three main types of rocks?

Back

The three main types of rocks are igneous, sedimentary, and metamorphic.