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4 Cards in this Set
- Front
- Back
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Have an atomic number higher than 88 and give off light, heat and radiation as their nucleus changes.
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Radioactive elements
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Causes an unstable atom to spontaneously lose energy by emitting particles and radiation. This process transforms one atom into a different atom.
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Radioactive Decay
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Scientific law that states rock layers that are youngest will be deposited on top of older layers, given normal conditions.
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Law of Superposition
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Scaled used to map the timing and relationships between events that have occurred during the history of the Earth.
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Geologic Time Scale
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