The Age of the Earth

Front

What is radioactive decay?

Back

Radioactive decay is the process by which unstable atomic nuclei lose energy by emitting radiation, transforming from parent isotopes into daughter isotopes.

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NGSS.HS-PS1-8

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons in its nucleus.

Front

Which radioactive isotope has the longest half-life?

Back

Rubidium-87 has the longest half-life among common radioactive isotopes.

Tags

NGSS.HS-PS1-8

Front

What role do neutrons play in an atom?

Back

Neutrons help to hold the nucleus of an atom together by providing nuclear stability.

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NGSS.HS-PS1-8

Front

What is the estimated age of meteorites, which is thought to be the age of most solar system objects?

Back

Meteorites are estimated to be about 4.55 billion years old.

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NGSS.HS-ESS1-6

Front

What is a half-life?

Back

A half-life is the time required for half of the radioactive atoms in a sample to decay into daughter isotopes.

Tags

NGSS.HS-PS1-8

Front

What are daughter isotopes?

Back

Daughter isotopes are the products formed when a parent isotope undergoes radioactive decay.

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NGSS.HS-PS1-8

Front

How do protons differ from neutrons?

Back

Protons are positively charged particles found in the nucleus, while neutrons are neutral particles that also reside in the nucleus.

Front

What is the significance of Carbon-14 in dating?

Back

Carbon-14 is used in radiocarbon dating to determine the age of organic materials up to about 50,000 years old.

Front

What is the primary source of radiation in an atom?

Back

The primary source of radiation in an atom comes from the decay of unstable isotopes.

Tags

NGSS.HS-PS1-8