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