Carbon Dating and Half Life of Carbon-14

The rate at which nuclear decay takes place is measured by

• neurons

• a radioisotope’s half-life.

• decay rates

• temperature

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The half-life of a radioisotope is

• the time it takes to double in size

• the time it takes to die

• the time it takes for half the nuclei to decay

• the time it takes to have dance party

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Who would use half-life of radioisotopes

• historians

• archaeologists

• builders

• engineers

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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

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

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

What contains carbon-14

• Cars

• Humans

• Trees and other plants

• Paper

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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.