ERAU WX-201 TEST 1 EXAM
QUESTIONS AND ANSWERS 100% PASS
2026/2027
Lapse rate - ANS The rate at which temperature decreases with an increase in altitude.
Wind direction - ANS the direction from which the wind is blowing
a variable gas in the Earth's atmosphere is - ANS water vapor
Troposhere - ANS The atmosphere layer closest to Earths surface in which we live
Air molecules are held near the earth's surface by ____. - ANS Gravity
The Temperature of the tropopause is much _____ than the temperature at Earth's surface -
ANS colder
At night, when the weather is extremely cold and dry, - ANS atmospheric pressure decreases
with increasing altitude
The only substance near Earth's surface that is found naturally in the current atmosphere as a
solid, liquid, and a gas is - ANS Water
@2026 ALLRIGHTS RESERVED 1
, Typically, water vapor occupies about what percentage of the air's volume near the earth's
surface? - ANS Less than 4%
In a volume of air near the earth's surface, ____ occupies 78 percent and ____ nearly 21
percent. - ANS Nitrogen; Oxygen
The gas that absorbs most of the harmful ultraviolet radiation in the stratosphere is: -
ANS ozone
Almost all of the earth's weather occurs in the: - ANS Troposphere
The weather element that ALWAYS decreases as we climb upward into the atmosphere is: -
ANS Pressure
There are more air molecules near Earth's surface making the air near the surface more: -
ANS Dense in comparison to higher up
Earth's atmosphere is divided into named layer based on: - ANS the vertical profile of air
temperature
The average temperature on the Earth's surface is: - ANS 59 degrees F
Much of the carbon dioxide found in earlier atmospheres is currently locked up in -
ANS carbonate rocks
The most abundant greenhouse gas in Earth's current atmosphere is - ANS water vapor (H20)
@2026 ALLRIGHTS RESERVED 2
QUESTIONS AND ANSWERS 100% PASS
2026/2027
Lapse rate - ANS The rate at which temperature decreases with an increase in altitude.
Wind direction - ANS the direction from which the wind is blowing
a variable gas in the Earth's atmosphere is - ANS water vapor
Troposhere - ANS The atmosphere layer closest to Earths surface in which we live
Air molecules are held near the earth's surface by ____. - ANS Gravity
The Temperature of the tropopause is much _____ than the temperature at Earth's surface -
ANS colder
At night, when the weather is extremely cold and dry, - ANS atmospheric pressure decreases
with increasing altitude
The only substance near Earth's surface that is found naturally in the current atmosphere as a
solid, liquid, and a gas is - ANS Water
@2026 ALLRIGHTS RESERVED 1
, Typically, water vapor occupies about what percentage of the air's volume near the earth's
surface? - ANS Less than 4%
In a volume of air near the earth's surface, ____ occupies 78 percent and ____ nearly 21
percent. - ANS Nitrogen; Oxygen
The gas that absorbs most of the harmful ultraviolet radiation in the stratosphere is: -
ANS ozone
Almost all of the earth's weather occurs in the: - ANS Troposphere
The weather element that ALWAYS decreases as we climb upward into the atmosphere is: -
ANS Pressure
There are more air molecules near Earth's surface making the air near the surface more: -
ANS Dense in comparison to higher up
Earth's atmosphere is divided into named layer based on: - ANS the vertical profile of air
temperature
The average temperature on the Earth's surface is: - ANS 59 degrees F
Much of the carbon dioxide found in earlier atmospheres is currently locked up in -
ANS carbonate rocks
The most abundant greenhouse gas in Earth's current atmosphere is - ANS water vapor (H20)
@2026 ALLRIGHTS RESERVED 2
