Chapter 12 Review Test Questions – Flashcards
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What is a characteristic of an index fossil?
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It is used to determine the age of fossils and the age of rock layers
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The smallest unit of geolgic time is an
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Epoch
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What do scientists estimate as the age of earth
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4.6 billion years old
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The miller Urey experiment demonstrated that
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Energy from lighting might have helped earths first organic molecules
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Scientists hypothesize that Cyanobacteria changed the early earth by
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Adding oxygen to the atmosphere
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The evolution of sexual reproduction resulted in
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Increased genetic variation
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The first land organisms emerged during the
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Paleozoic era
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The age of reptiles is a term often used to describe the
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Mesozoic era
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Which unit of geologic time followed the mass extinction of dinosaurs
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Cenozoic era
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What group of animals includes modern humans
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Primates
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The fossil record identifies the hominid with the largest brain as
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Homo neanderthalensis
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Fossil evidence suggests Homo sapiens first appeared
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200,000 years ago
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A group of fossils of modern organisms would most likely be found in which era?
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Cenozoic era
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The Cambrian explosion occurred in
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The Paleozoic era
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The Mesozoic era was dominated by
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Reptiles and dinosaurs
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What. Is consummation
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Revelation. Jesus will come back
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Why is radio metric dating used more than carbon dating
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Radiometric dating is easier to conduct than carbon dating and gives a more accurate age or date
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The amount of time it takes for half of an isotope in a sample to decay into a different element
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Half life
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Used to estimate when something lived based on comparing where it is found Ina rock layer in relation to other rock layers
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Index fossil or relative dating
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Condensing cloud of gas and dust in space is called
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Nebula
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An organism that walks upright on two legs is a
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Bipedal
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This group is the oldest living primate group. Most are small and are active at night.
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Prosimians
