Gen Sci CH 36 Question Preview (ID: 35744)
Geologic Time Scale.
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Which epoch are we currently in?
a) Pleistocene
b) Holocene
c) Cytosine
d) Cenozoic
Absolute time is stated in years.
a) True
b) False
c)
d)
Relative time is
a) expressed in years
b) an order of events
c) half a billion years long
d) the time it takes for half of a sample of unstable material to stabilize
The Hadean Eon was a calm time in Earth's history.
a) True
b) False
c)
d)
Reptiles like dinosaurs were the dominant creature in...
a) Mesozoic Era
b) Cenozoic Era
c) Pleistocene Epoch
d) Paleozoic Era
The principle of superposition states that
a) younger layers are at the bottom and older layers are at the top
b) young and old layers are mixed together
c) younger layers are at the top and older layers are at the bottom
d) young layers are at the bottom and older layers are in the middle
During which eon did cyanobacteria evolve?
a) Hadean
b) Archean
c) Proterozoic
d) Phanerozoic
The Cenozoic Era is known as the
a) Age of the Reptiles
b) Age of the Cyanobacteria
c) Age of Aquarius
d) Age of Mammals
Inclusions are younger than the rocks that contain them.
a) True
b) False
c)
d)
Radioactive isotopes become stable when they
a) lose energy
b) lose particles
c) gain particles
d) lose both energy and particles
What event occurred to end Precambrian time?
a) Permian Extinction
b) Cretaceous Extinction
c) Snowball Earth
d) Mini Ice Age
The Impact Hypothesis states that a large asteroid hit Earth and triggered climate change.
a) True
b) False
c)
d)
The time required for half of the atoms in any sample of an unstable isotope to decay is called
a) half life
b) quarter life
c) daughter life
d) parent life
What did cyanobacteria do for our planet?
a) provided the to form landmasses
b) released carbon dioxide into the air
c) released oxygen into the air
d) all of the above
Gaps in the rock record are called
a) unconformities
b) oopsies
c) erosional surfaces
d) negativitites
The largest mass extinction to ever happen on Earth was the
a) Permian
b) Cretaceous
c) Pleistocene
d) Big
What is an interglacial period?
a) a time when the ice age is at its peak
b) the beginning of the ice age
c) a time between ice ages
d) none of the above
The longest length of time on the geologic time scale is
a) eras
b) epochs
c) periods
d) eons
Which is not a period of the Mesozoic Era?
a) Jurassic
b) Cretaceous
c) Panthalassic
d) Triassic
The Permian extinction occurred at the same time as the largest known volcanic eruption.
a) True
b) False
c)
d)
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