Meteorologist
a scientist who studies the weather
Forecast
a prediction about what kind of weather to expect
Atmosphere
the gases surrounding the Earth
Weather variable
data that weather scientists measure
Pressure
the push when compressed air pushes back
Compress
to force air into a smaller space
Thermometer
a weather instrument that measures temperature in degree Celsuis
Hygrometer
a weather instrument that measures humidity in percent
Wind vane
a weather instrument that measures wind direction
Barometer
a weather instrument that measures air pressure in millibars
Troposphere
layer of Earth's atmosphere where most weather happens
Weather
the condition of the air around us
Nitrogen
the most plentiful gas in Earth's atmosphere
Oxygen
the second most plentiful gas in Earth's atmosphere
Air
the mixture of gases surrounding Earth
Air pressure
the force exerted on a surface by the mass of the air above it
humidity
water vapor in the air
mass
the amount of material in something
matter
anything that takes up space and has mass
precipitation
rain, snow, sleet or hail that falls to the ground
temperature
a measure of how hot the air is
visibility
the distance one can see through the air at ground level
wind
air in motion
wind speed
how fast the air is moving past an observation point
wind direction
the compass direction from which the wind is coming