WX201 EXAM 1 QUESTIONS AND
ANSWERS 100% PASS 2026/2027
What is the definition of weather? - ANS The condition of the atmosphere at a specific time
and place.
How is climate defined? - ANS The average weather over a long period of time (years to
decades).
List the main weather and climate variables. - ANS Temperature, Pressure, Wind (speed &
direction), Precipitation, Humidity (dew point), Clouds/sky cover, Visibility.
What does temperature measure? - ANS An indirect measure of the average kinetic energy of
air molecules.
How do thermometers work? - ANS They work via the expansion and contraction of
materials.
What are the types of thermometers? - ANS Liquid-in-glass, Electronic, Infrared,
Thermograph.
Where should surface temperature measurements be taken? - ANS In the shade, in a white,
ventilated shelter, 2 meters above ground.
@2026 ALLRIGHTS RESERVED 1
, What are the freezing and boiling points in Celsius? - ANS Freezing: 0°C, Boiling: 100°C.
What is the formula to convert Celsius to Fahrenheit? - ANS °C = (°F − 32) × 5/9.
What is atmospheric pressure? - ANS The weight of air above a location.
How does pressure change with altitude? - ANS Pressure decreases with height; cold air
decreases pressure more rapidly than warm air.
What is the Ideal Gas Law? - ANS Pressure depends on temperature, density, and molecular
motion.
What instruments are used to measure pressure? - ANS Barometer, Mercury barometer,
Aneroid barometer.
What is the definition of precipitation? - ANS Any water (liquid or solid) falling from clouds.
What is humidity? - ANS The amount of water vapor in the air.
What does a station plot include? - ANS Temperature, Dew point, Wind, Pressure, Pressure
tendency, Sky cover, Present weather.
What is the difference between station pressure and sea-level pressure? - ANS Station
pressure is measured at elevation; sea-level pressure is adjusted to 0 m elevation.
What is an isotherm? - ANS A line of constant temperature on a map.
@2026 ALLRIGHTS RESERVED 2
ANSWERS 100% PASS 2026/2027
What is the definition of weather? - ANS The condition of the atmosphere at a specific time
and place.
How is climate defined? - ANS The average weather over a long period of time (years to
decades).
List the main weather and climate variables. - ANS Temperature, Pressure, Wind (speed &
direction), Precipitation, Humidity (dew point), Clouds/sky cover, Visibility.
What does temperature measure? - ANS An indirect measure of the average kinetic energy of
air molecules.
How do thermometers work? - ANS They work via the expansion and contraction of
materials.
What are the types of thermometers? - ANS Liquid-in-glass, Electronic, Infrared,
Thermograph.
Where should surface temperature measurements be taken? - ANS In the shade, in a white,
ventilated shelter, 2 meters above ground.
@2026 ALLRIGHTS RESERVED 1
, What are the freezing and boiling points in Celsius? - ANS Freezing: 0°C, Boiling: 100°C.
What is the formula to convert Celsius to Fahrenheit? - ANS °C = (°F − 32) × 5/9.
What is atmospheric pressure? - ANS The weight of air above a location.
How does pressure change with altitude? - ANS Pressure decreases with height; cold air
decreases pressure more rapidly than warm air.
What is the Ideal Gas Law? - ANS Pressure depends on temperature, density, and molecular
motion.
What instruments are used to measure pressure? - ANS Barometer, Mercury barometer,
Aneroid barometer.
What is the definition of precipitation? - ANS Any water (liquid or solid) falling from clouds.
What is humidity? - ANS The amount of water vapor in the air.
What does a station plot include? - ANS Temperature, Dew point, Wind, Pressure, Pressure
tendency, Sky cover, Present weather.
What is the difference between station pressure and sea-level pressure? - ANS Station
pressure is measured at elevation; sea-level pressure is adjusted to 0 m elevation.
What is an isotherm? - ANS A line of constant temperature on a map.
@2026 ALLRIGHTS RESERVED 2
