Atmosphere Question Preview (ID: 49718)


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Which statement best describes the molecules in the exosphere?
a) The molecules are tightly packed.
b) The molecules are spread far apart.
c)
d)

What is the definition of air pressure?
a) A mixture of gases that surround a planet, held by gravity.
b) The height above sea level
c) How tightly packed molecules are in a given space
d) The force that air exerts on all objects

The layers of the atmosphere are classified according to changes in...
a) Altitude and air quality
b) Humidity and temperature
c) Air pressure and oxygen
d) Temperature and air pressure

True or False: The atmosphere is a mixture of elements and compounds.
a) True
b) False
c)
d)

What is the definition of atmosphere?
a) A mixture of gases that surround a planet, held by gravity.
b) The height above sea level
c) The measure of how tightly packed molecules are in a given space
d) The force of air that pushes on an object

Which two gases are the most abundant in the Earth's atmosphere?
a) Carbon dioxide and hydrogen
b) Oxygen and hydrogen
c) Carbon dioxide and oxygen
d) Nitrogen and oxygen

Which layer protects humans from most harmful UV rays from the Sun?
a) Exosphere
b) Jet Stream
c) Clouds
d) Ozone Layer

Which answer lists the order of the layers of the atmosphere from closest to Earth to farthest?
a) Stratosphere --Mesosphere--Thermosphere--Troposphere--Exosphere
b) Thermosphere--Stratosphere--Mesosphere--Troposphere--Exosphere
c) Troposphere--Stratosphere--Mesosphere--Thermosphere--Exosphere
d) Mesosphere--Thermosphere--Exosphere--Troposphere--Stratosphere

Which layer contains the least number of molecules (least dense layer)?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Exosphere

Which layer contains the ionosphere that cause the auroras?
a) Stratosphere
b) Thermosphere
c) Mesosphere
d) Exosphere

Which layer has the hottest molecules?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere

Which layer protects us from meteors?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Exosphere

Most life exists in which layer?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Exosphere

Which layer contains the ozone layer?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere

Which layer contains 75-80% of all molecules (densest layer)?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere

Which layer do satellites orbit?
a) Troposphere
b) Stratosphere
c) Thermosphere
d) Exosphere

Which two layers do airplanes fly in?
a) Troposphere and Stratosphere
b) Mesosphere and Thermosphere
c) Stratosphere and Mesosphere
d) Thermosphere and Exosphere

What percentage of the Earth's atmosphere is made of Nitrogen?
a) 78%
b) 21%
c) 1%
d)

What percentage of Earth's atmosphere is made of Oxygen?
a) 78%
b) 21%
c) 1%
d)

What percentage of the Earth's atmosphere is made of other gases?
a) 78%
b) 21%
c) 1%
d)

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