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Atoms with the same atomic number but different mass numbers are called ____.
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
Radiocarbon dating could be used to date which of the following?
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
The time it takes for 50% of the nuclei in a radioactive sample to decay to its stable isotope is called ____.
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
In living things, what is the source of the carbon-14 that is used in radiocarbon dating?
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
Radiometric dating is possible because the rates of decay of radioactive isotopes ____.
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
When the nucleus of an atom decays spontaneously, it's called:
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
The geological processes that shape Earth's features today ____.
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
According to the principle of cross-cutting relationships, an intrusive rock body is ____.
the half-life
younger than the rocks it intrudes
are basically the same as they were in the geologic past
60,000-year-old mammoth bone
radioactivity
isotopes
carbon dioxide in the atmosphere
are constant
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