Earth History Test Review: Question Preview (ID: 8247)


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What process caused the material that formed the Earth to gather long ago?
a) solar wind b) radioactive decay c) gravitational contraction d) magma cooling
What did the mass extinction at the end of the Permian Period lead to?
a) abundant new life-forms in the Mesozoic and Cenozoic Era b) fewer resources during the Mesozoic Era c) little change in the Mesozoic Era d) abundant new life-forms in the Paleozoic Era
According to the impact hypothesis, dinosaurs became extinct when
a) the continents moved apart b) the sun got too close to the Earth c) a giant meteorite crashed into Earth d) volcanic activity increased
The repeated advance and retreat of ice sheets characterized which Epoch?
a) Pennsylvanian b) Pleistocene c) Cambrian d) Mississippian
Where are the oldest rocks located on a geologic column.
a) the bottom b) the middle c) the top d) the back
The formation of an oxygen atmosphere began during which Era?
a) Cenozoic Era b) Precambrian Era c) Paleozoic Era d) Mesozoic Era
The age of an object in relation to the ages of other objects is known as its
a) relational age b) relative age c) absolute age d) comparative age
Index fossils found in rock layers in different areas of the world indicate that the rock layers
a) formed during the same period of time. b) formed during different periods of time. c) are still forming. d) never fully formed.
This isotope is used to date objects less than 70,000 years old.
a) Carbon-51 b) Nitrogen-14 c) Carbon-14 d) Radium-14
How is radioactive decay used to determine the absolute age of rocks?
a) Radioactive decay cannot be used to determine the age of a rock. b) Isotopes of different compounds are compared. c) Original radioactive material remaining in the sample is compared to non-radioactive material formed d)
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