WX 201 EXAM 1 STUDY GUIDE
QUESTIONS AND ANSWERS 100% PASS
2026/2027
Variable gasses in the atmosphere - ANS CO2 , Water Vapor , O3 (ozone) , CH4(methane)
Permanent gasses in the atmosphere - ANS Oxygen (O2) , Nitrogen (N2) , Nobel Gasses
Characteristics of a variable gas - ANS Concentration is changing ; sources and sinks are not
consistent
Characteristics of a permanent gas - ANS Concentration in atmosphere remains constant ;
sources and sinks consistent
Examples of green house gasses - ANS CH4 , CO2 , CFCs , O3
Why are scientists predicting global warming? - ANS The concentration of greenhouse gasses
in the atmosphere has been rising significantly since industrial revolution
What causes the ozone hole? - ANS CFCs (chlorofluorocarbons) ; found in aerosols
@2026 ALLRIGHTS RESERVED 1
, What are the implications of ozone depletion? - ANS Decreased absorption of harmful UV
radiation
Density - ANS mass/volume
Pressure - ANS force / area
What equation relates density, pressure, and temperature - ANS Ideal gas law ; P∝ DT
What is used to measure density, pressure, and temperature? - ANS Weather balloons
How do altimeters work? - ANS Aneroid barometer inside measures pressure and infers your
altitude
Standard lapse rate - ANS Temperature decreases 2°C for every 1000ft up to 36000ft
What causes indicated altitude to differ from the true altitude? - ANS Changes in surface air
pressure, temperature, elevation
What are the four layers of the atmosphere? - ANS troposphere, stratosphere, mesosphere,
thermosphere
What layer does most weather occur in ? - ANS Troposphere
What layer of the atmosphere contains the ozone layer? - ANS Stratosphere
@2026 ALLRIGHTS RESERVED 2
QUESTIONS AND ANSWERS 100% PASS
2026/2027
Variable gasses in the atmosphere - ANS CO2 , Water Vapor , O3 (ozone) , CH4(methane)
Permanent gasses in the atmosphere - ANS Oxygen (O2) , Nitrogen (N2) , Nobel Gasses
Characteristics of a variable gas - ANS Concentration is changing ; sources and sinks are not
consistent
Characteristics of a permanent gas - ANS Concentration in atmosphere remains constant ;
sources and sinks consistent
Examples of green house gasses - ANS CH4 , CO2 , CFCs , O3
Why are scientists predicting global warming? - ANS The concentration of greenhouse gasses
in the atmosphere has been rising significantly since industrial revolution
What causes the ozone hole? - ANS CFCs (chlorofluorocarbons) ; found in aerosols
@2026 ALLRIGHTS RESERVED 1
, What are the implications of ozone depletion? - ANS Decreased absorption of harmful UV
radiation
Density - ANS mass/volume
Pressure - ANS force / area
What equation relates density, pressure, and temperature - ANS Ideal gas law ; P∝ DT
What is used to measure density, pressure, and temperature? - ANS Weather balloons
How do altimeters work? - ANS Aneroid barometer inside measures pressure and infers your
altitude
Standard lapse rate - ANS Temperature decreases 2°C for every 1000ft up to 36000ft
What causes indicated altitude to differ from the true altitude? - ANS Changes in surface air
pressure, temperature, elevation
What are the four layers of the atmosphere? - ANS troposphere, stratosphere, mesosphere,
thermosphere
What layer does most weather occur in ? - ANS Troposphere
What layer of the atmosphere contains the ozone layer? - ANS Stratosphere
@2026 ALLRIGHTS RESERVED 2
