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Biology > Dating > Flashcards

Dating Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Radiometric Dating

A

Measuring radioactivity

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2
Q

Types of Radioactivity

A

Weak nuclear, strong nuclear, gravity, electromagnetic

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3
Q

Radioactivity

A

Bits of matter or energy in the form of photons emitted from the nucleus of an atom

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4
Q

Half-Life

A

The time it takes for 1/2 of the radioactive isotopes in a sample to undergo decay. By measuring how much radioactivity remains in a sample you can tell how old it is.

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5
Q

Absolute dating

A

Radioactivity in the fossil itself is date

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6
Q

Carbon 14

A

Carbon 14 is a radioactive isotope. Carbon cycle ends and Carbon 14 continues to decay. the ratio tells us how long ago something died.

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7
Q

Theory

A

Why something happens, explanation

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8
Q

Scientific Fact

A

Directly measurable

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9
Q

Relative Dating

A

Date the rock and soil layers in which the fossil is found. Useful for old fossils.

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Biology (15 decks)

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