North Carolina Science Grade 7

Chapter 16: Atmosphere

Atmosphere

1.
What is the outermost layer of the atmosphere called?
A)thermosphere
B)stratosphere
C)mesosphere
D)exosphere
2.
What causes a shooting star?
A)a comet in the thermosphere
B)a meteor in the troposphere
C)a comet in the stratosphere
D)a meteor in the mesosphere
3.
What would happen if Earth had no atmosphere?
A)Earth would not have nights.
B)The days would be hot and the nights would be cold.
C)The days would be cold and the nights would be hot.
D)Earth would not have days.
4.
What is the most abundant gas in Earth's atmosphere?
A)oxygen
B)hydrogen
C)nitrogen
D)carbon
5.
What form of energy transfer heats Earth?
A)conduction
B)radiation
C)convention
D)recycling
6.
Why are there fewer molecules of air up in the mountains?
A)because air pressure increases as you go higher
B)because air pressure is the same throughout all layers of the atmosphere
C)because air is too heavy
D)because air pressure decreases as you go higher
7.
Why are the thermosphere and exosphere the warmest of the atmospheric layers?
A)because of the gases trapped in these layers
B)because the air pressure is too great
C)because the underlying mesosphere keeps the warm air there
D)because they are closest to the Sun
8.
Where can CFCs be found?
A)all answers are correct
B)refrigerators
C)air conditioners
D)aerosol sprays
9.
What's the difference between ozone and the oxygen you breath?
A)Ozone is made of three atoms of oxygen, and the oxygen you breathe is made of two.
B)Ozone is made of two atoms of oxygen and the oxygen you breath is made of three.
C)They're made of totally different atoms.
D)One is in gas form and the other is in liquid form.
10.
Heat flows from __________.
A)medium to high temperature
B)same temperature to same temperature
C)low to high temperature
D)high to low temperature
11.
What have CFCs done to Earth and its atmosphere?
A)They have caused the number of cancer cases to rise.
B)They have created a hole in the ozone layer.
C)They have caused more ultraviolet radiation to reach Earth.
D)all answers are correct
12.
What is it called when water changes from gas to liquid?
A)evaporation
B)condensation
C)melting
D)freezing
13.
How many layers does Earth's atmosphere have?
A)four
B)six
C)seven
D)five
14.
Force exerted on an area is called __________.
A)pressure
B)gravity
C)temperature
D)mass
15.
How have humans altered the composition of Earth's atmosphere?
A)They have polluted it with excess ozone.
B)They have made the atmospheric temperature drop.
C)They have polluted it with carbon dioxide gas.
D)They have made the atmospheric pressure drop.
16.
Within which layer of the atmosphere do you find rain, snow, and clouds?
A)thermosphere
B)mesosphere
C)stratosphere
D)troposphere
17.
What two forms of heat transfer help create a sea breeze?
A)radiation and conduction
B)convection and radiation
C)radiation and recycling
D)convection and conduction
18.
Conduction is the transfer of heat through __________.
A)touch
B)empty space
C)thoughts
D)radiation
19.
Which layer of the atmosphere contains the ozone layer?
A)stratosphere
B)thermosphere
C)exosphere
D)troposphere
20.
How does the atmosphere benefit Earth?
A)It protects Earth from cold air.
B)It protects Earth from the Sun's harmful rays.
C)It protects Earth from other planets.
D)It creates water.
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