Carbon-14

Why do we use half life of the radioisotope carbon-14?

• to determine the age of fossils and ancient materials

• to record sea floor spreading

• to breakdown the process of decay

• to measure the radioactivity of objects

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NGSS.HS-PS1-8

Carbon dating relies on

• the fact that all living things contain a small amount of carbon-14

• organisms dying

• washing your hands

• organism remaining constant

Explain what the graph means

Therefore, by measuring the amount of carbon-14 in fossils and bones, scientists can

The length of time required for half of the radioactive atoms in a sample to decay is its...

• era

• age

• half-life

• eon

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NGSS.HS-PS1-8

How many half lives does it take for less than 10% of carbon-14 to remain?

This graph demonstrates exponential decay. Describe this pattern in words.

What would the percentage be after 15 years?

What is the half-life of carbon-14?

Tags

NGSS.HS-PS1-8

The rate at which nuclear decay takes place is measured by

• neurons

• a radioisotope’s half-life.

• decay rates

• temperature

Tags

NGSS.HS-PS1-8