Fossils, Geologic Time, Adaptations: Question Preview (ID: 16685)

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Animal life in the Cenozoic Era includes ___________.
a) marine life b) birds c) mammals d) all of the above
__________ on the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present.
a) Eras b) Periods c) Epochs d) all of the above
Animal life in the Paleozoic Era included all of the following EXCEPT ________.
a) marine life b) birds c) mammals d) all of the above
Little is known about much of Earth's early history because ________.
a) Precambrian rocks have been deeply buried b) Precambrian rocks have been changed by heat and pressure c) Precambrian soft-bodied life-forms weren't often preserved as fossils d) all of the above
Pangaea separated into ________.
a) two large landmasses b) four continents c) two southern landmasses d) none of the above
Trilobites are index fossils because they _________.
a) changed slowly through time b) lived over large areas of the world c) exhibit specific characteristics d) all of the above
The longest subdivision in geologic time is a(n) ________.
a) epoch b) period c) century d) eon
__________ existed during the Mesozoic Era.
a) Angiosperms b) Humans c) Birds d) Both a and c
A life-form in the Precambrian time was __________.
a) cyanobacteria b) humans c) reptiles d) dinosaurs
Geologic time is divided into units based upon types of _________.
a) sedimentary rocks b) climatic changes c) organisms d) igneous rocks
Rock layers are related if they both contain the same _________.
a) elements b) shapes c) fossils d) type of rock
If a layer of sandstone lies on top of a layer of limestone in which a 300 million year old fossil is found, and there are no unconformities, the layer of sandstone must be ________.
a) older than 300 million years b) younger than 300 million years c) about 300 million years old d) older than 600 million years
In a series of undisturbed rock layers where shale lies between sandstone below and limestone above, the ________.
a) limestone is youngest b) shale is youngest c) sandstone is youngest d) beds are all the same age
A limestone bed containing fossils that are 550 million years old is ______ a bed of sandstone containing fossils that are 400 million years old.
a) younger than b) the same age as c) older than d) not related to
Gaps in rock layers are called _________.
a) unconformities b) index fossils c) half-lives d) none of the above
Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ______________.
a) absolute dating b) radiometric dating c) relative dating d) radio carbon dating
If the same types of fossils are found in two separate rock layers, it's likely that the two rock layers ___________.
a) formed at different times b) are part of one continuous deposit c) formed under different conditions d) none of the above
The division of Earth's history into smaller units makes up the _______.
a) eras b) geologic time scale c) periods d) sequence of events
Humans first appeared during the ___________ Era.
a) Precambrian b) Paleozoic c) Mesozoic d) Cenozoic
The longest division of time in Earth's history is known as __________.
a) Pangaea b) Mesozoic c) Triassic d) Precambrian
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