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is measured in half-lives
Radioactive decay is measured in half-lives.
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Asked 5/4/2015 11:27:51 AM
Updated 5/4/2015 11:47:57 AM
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Radioactive decay is measured in half-lives.
Added 5/4/2015 11:47:57 AM
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Confirmed by jeifunk [5/4/2015 11:53:36 AM]
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____ on the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present. a. Eras c. Epochs b. Periods d. all of the above
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If a species can adapt to a changing environment, or ____, its descendants will survive. a. evolve c. stay the same b. become extinct d. none of the above
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The formation of the moon may have caused the Paleozoic extinction. True or false
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Updated 5/4/2015 12:31:36 PM
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The formation of the moon may have caused the Paleozoic extinction. False.

Added 5/4/2015 12:31:36 PM
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Life-forms that existed during the Paleozoic Era included ____. a. fish c. reptiles b. trilobites d. all of the above
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Updated 5/4/2015 12:31:24 PM
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ALL OF THE ABOVE. Life-forms that existed during the Paleozoic Era included fish, reptiles and trilobites.
Added 5/4/2015 12:31:23 PM
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the process in which one of an isotope's neutrons breaks down into a proton and an electron and the electron leaves the atom as a beta particle
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Updated 8/26/2016 5:02:26 AM
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Beta decay is the process in which one of an isotope's neutrons breaks down into a proton and an electron and the electron leaves the atom as a beta particle.
Added 8/26/2016 5:02:26 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/26/2016 5:03:15 AM]
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