Earth's history review

Front

What is the term for the disappearance of a species?

Back

Extinction

Tags

NGSS.HS-LS4-5

Front

What method do scientists use to determine that the Earth is about 4.5 billion years old?

Back

Radioactive dating

Front

Which geological period are we currently in?

Back

Quaternary

Tags

NGSS.MS-ESS1-4

Front

If 10 mg of iodine-131 is given to a patient, how much is left after 24 days if the half-life is 8 days?

Back

1.25 mg

Tags

NGSS.HS-PS1-8

Front

What is the term for saying you are older than your sister?

Back

Relative age dating

Front

What is the definition of extinction?

Back

The end of an organism or a group of organisms, resulting in no living members.

Tags

NGSS.HS-LS4-5

Front

What is radioactive dating?

Back

A method used to date materials by comparing the abundance of a radioactive isotope to its decay products.

Tags

NGSS.HS-PS1-8

Front

What is the difference between absolute age dating and relative age dating?

Back

Absolute age dating provides a specific age, while relative age dating places events in order without exact dates.

Front

What is the significance of the half-life in radioactive dating?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay.

Tags

NGSS.HS-PS1-8

Front

What is the law of superposition?

Back

In undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top.