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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
Cytosine
B
Holocene
C
Cenozoic
D
Pleistocene
2) Absolute time is stated in years.
A
False
B
True
3) 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
4) The Hadean Eon was a calm time in Earth's history.
A
True
B
False
5) Reptiles like dinosaurs were the dominant creature in...
A
Pleistocene Epoch
B
Paleozoic Era
C
Mesozoic Era
D
Cenozoic Era
6) The principle of superposition states that
A
younger layers are at the bottom and older layers are at the top
B
younger layers are at the top and older layers are at the bottom
C
young and old layers are mixed together
D
young layers are at the bottom and older layers are in the middle
7) During which eon did cyanobacteria evolve?
A
Proterozoic
B
Phanerozoic
C
Archean
D
Hadean
8) The Cenozoic Era is known as the
A
Age of Mammals
B
Age of Aquarius
C
Age of the Cyanobacteria
D
Age of the Reptiles
9) Inclusions are younger than the rocks that contain them.
A
True
B
False
10) Radioactive isotopes become stable when they
A
lose energy
B
lose both energy and particles
C
gain particles
D
lose particles
11) What event occurred to end Precambrian time?
A
Snowball Earth
B
Cretaceous Extinction
C
Permian Extinction
D
Mini Ice Age
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
quarter life
B
parent life
C
half life
D
daughter life
14) What did cyanobacteria do for our planet?
A
released oxygen into the air
B
released carbon dioxide into the air
C
all of the above
D
provided the to form landmasses
15) Gaps in the rock record are called
A
unconformities
B
negativitites
C
oopsies
D
erosional surfaces
16) The largest mass extinction to ever happen on Earth was the
A
Cretaceous
B
Pleistocene
C
Permian
D
Big
17) What is an interglacial period?
A
none of the above
B
a time when the ice age is at its peak
C
a time between ice ages
D
the beginning of the ice age
18) The longest length of time on the geologic time scale is
A
periods
B
epochs
C
eras
D
eons
19) Which is not a period of the Mesozoic Era?
A
Jurassic
B
Cretaceous
C
Triassic
D
Panthalassic
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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