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