Praxis - Science 5005 Questions
Skill 9.1 (average)
186. The Earth's core is _____ it's mantle.
A. less dense than
B. denser than
C. just as dense as
D. the core and mantle are the same - answerB. denser than
The earth's core is denser as the heaviest matter is found at the Earth's center.
Skill 9.1 (average)
187. Which of the following is NOT located in the upper mantle?
A. sial
B. asthenosphere
C. troposphere
D. mesosphere - answerA. sial
The troposphere is located in the earth's atmosphere. The sial is the layer of the
lithosphere that is above water.
Skill 9.1 (easy)
188. ______ is the second-most abundant gas in the earth's atmosphere.
A. nitrogen
B. argon
C. oxygen
D. chlorine - answerC. oxygen
Oxygen is the second most abundant gas, behind nitrogen.
Skill 9.1 (average)
189. The ________ is the coldest layer in the atmosphere.
A. mesosphere
B. thermosphere
C. troposphere
, D. stratosphere - answerA. mesosphere
The mesosphere is the coldest layer in the atmosphere, with average temperatures
reaching close to -100 degree C at its top.
Skill 9.1 (challenging)
190. When gases in the _____ emit light energy after being excited by solar radiation,
the Aurora Borealis occurs in the northern hemisphere.
A. exosphere
B. stratosphere
C. ionosphere
D. troposphere - answerC. ionosphere
Auroras can occur around 80 kilometers or more above the earth's surface. This
distance demarcates the ionosphere, which is the lowest layer of the thermosphere. The
exosphere is the upper layer of the thermosphere.
Skill 9.2 (average)
191. _______ is natural mountain building.
A. orogeny
B. dip slip
C. folding
D. faulting - answerA. orogeny
Orogeny is the process of natural mountain building. Folding, dip slip, and faulting are
ways in which different shaped mountains can form.
Skill 9.2 (average)
192. When lava cools, ______ rock is formed.
A. sedimentary
B. igneous
C. metamorphic
D. flint - answerB. igneous
Igneous rocks forms are lava cools, and this can happen above or below ground.
Skill 9.2 (challenging)
193. Which of the following is true about the three rock types?
Skill 9.1 (average)
186. The Earth's core is _____ it's mantle.
A. less dense than
B. denser than
C. just as dense as
D. the core and mantle are the same - answerB. denser than
The earth's core is denser as the heaviest matter is found at the Earth's center.
Skill 9.1 (average)
187. Which of the following is NOT located in the upper mantle?
A. sial
B. asthenosphere
C. troposphere
D. mesosphere - answerA. sial
The troposphere is located in the earth's atmosphere. The sial is the layer of the
lithosphere that is above water.
Skill 9.1 (easy)
188. ______ is the second-most abundant gas in the earth's atmosphere.
A. nitrogen
B. argon
C. oxygen
D. chlorine - answerC. oxygen
Oxygen is the second most abundant gas, behind nitrogen.
Skill 9.1 (average)
189. The ________ is the coldest layer in the atmosphere.
A. mesosphere
B. thermosphere
C. troposphere
, D. stratosphere - answerA. mesosphere
The mesosphere is the coldest layer in the atmosphere, with average temperatures
reaching close to -100 degree C at its top.
Skill 9.1 (challenging)
190. When gases in the _____ emit light energy after being excited by solar radiation,
the Aurora Borealis occurs in the northern hemisphere.
A. exosphere
B. stratosphere
C. ionosphere
D. troposphere - answerC. ionosphere
Auroras can occur around 80 kilometers or more above the earth's surface. This
distance demarcates the ionosphere, which is the lowest layer of the thermosphere. The
exosphere is the upper layer of the thermosphere.
Skill 9.2 (average)
191. _______ is natural mountain building.
A. orogeny
B. dip slip
C. folding
D. faulting - answerA. orogeny
Orogeny is the process of natural mountain building. Folding, dip slip, and faulting are
ways in which different shaped mountains can form.
Skill 9.2 (average)
192. When lava cools, ______ rock is formed.
A. sedimentary
B. igneous
C. metamorphic
D. flint - answerB. igneous
Igneous rocks forms are lava cools, and this can happen above or below ground.
Skill 9.2 (challenging)
193. Which of the following is true about the three rock types?
