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Earth's History
Test Description: Chapter 11 Review
Instructions: Answer all questions to get your test result.
1) If all Earth’s history took place in one year starting on January 1, humans would have appeared in _______________
A
December
B
October
C
July
D
June
2) Earth formed layers because _____ pulled more dense material to the center.
A
Gravity
B
Plate Tectonics
C
Magnetism
D
Weather
3) Geologic time is divided into units based upon types of _____.
A
climatic changes
B
igneous rocks
C
organisms
D
sedimentary rocks
4) The longest subdivision in geologic time is a(n) _____.
A
period
B
epoch
C
eon
D
century
5) Little is known about much of Earth’s early history because _____.
A
Precambrian rocks have been deeply buried
B
Precambrian soft-bodied life-forms weren’t often preserved as fossils
C
Precambrian rocks have been changed by heat and pressure
D
all of the above
6) The division of Earth’s history into smaller units makes up the _____.
A
periods
B
eras
C
sequence of events
D
geologic time scale
7) Geologists organized the geologic time scale based on _____.
A
fossils in the rock layers
B
evenly spaced time segments
C
superposition
D
both Superposition and Fossils in rock layers
8) A life-form in the Precambrian time was _____.
A
reptiles
B
dinosaurs
C
cyanobacteria
D
humans
9) After the Sun formed, gravity _____.
A
pulled pieces of material together to form planets, including Earth.
B
neither a nor b
C
both a and b
D
pushed particles away from the center of the Sun.
10) During the great Proterozoic eon, the percentage of oxygen in the atmosphere changed _____.
A
from 20% to 3%
B
from 3% to 5%
C
from 3% to 20%
D
from 10% to 100%
11) Two supercontinents, _____ and _____, had warm shallow oceans near the shores.
A
Asia, Rodinia
B
Pangea, Rodinia
C
Pangea, Spriggina
D
Pangea, Asia
12) Toward the end of the Proterozoic eon, which of the following formed?
A
the first single-cellular organisms
B
the first multicellular organisms
C
the final multicellular organisms
D
the final single-cellular organisms
13) Why do scientists hypothesize that an asteroid impact led to a mass extinction event?
A
An asteroid would have introduced poisonous gasses into Earth’s atmosphere.
B
An asteroid impact would have changed Earth’s climate so rapidly that organisms didn’t have a chance to adapt.
C
A large asteroid would have landed on so many organisms that it killed all the members of many species.
D
All of the above are true statements.
14) Major changes in the environment _____.
A
can cause many existing organisms to go extinct
B
all of the above
C
can cause new organisms to flourish
D
can result in existing organisms to adapt quickly
15) How would an asteroid impacting Earth effect the climate?
A
The dust and rocks thrown into the atmosphere rapidly cause global cooling.
B
The dust and rocks thrown into the atmosphere rapidly cause global warming.
C
The dust and rocks thrown into the atmosphere slowly cause global warming.
D
The dust and rocks thrown into the atmosphere slowly cause global cooling.
*select an answer for all questions
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