1. WEATHER WEATHER is… DAILY CHANGES OF THE EARTH’S ATMOSPHERIC VARIABLES
ATMOSPHERIC VARIABLES INCLUDE…
Temperature- measure of amount of heat in the air
Humidity- measure of the amount of water vapor in the air
Wind- movement of air across Earth’s surface
Pressure- the amount of air pushing on Earth’s surface
Cloud Cover- percentage of sky covered with clouds
These variable determine the daily weather!

2. She’s standing in the troposphere
According to ESRT the troposphere is the lowest layer of Earth’s atmosphere
The troposphere has…
-all the water vapor
-all the clouds
-all the weather
-almost all the air

3. Atmospheric Structure

4. Atmosphere
Ozone layer
All weather,
clouds most air

5. Atmospheric Composition
Page 1 of ESRT: Average Composition Chart
-What are the most abundant elements in the atmosphere?
-78% Nitrogen
-21% Oxygen
-1% Argon, Helium and a few others…

6. Variable measurement Temperature is measured with a thermometer
Wind speed is measured with an
anemometer
Wind direction measured
with a wind vane…

7. Variable measurement Humidity is measured with a psychrometer
Air pressure is measured with an
barometer

8. Temperature Temperature is Measured in 3 different scales…
-Celsius (C)
-Fahrenheit (F)
-Kelvin (K)

9. Pressure Pressure is Measured in 3 different scales… -millibars (mb)
-inches (in Hg)
-atmospheres (atm)
One atmosphere =
____mb and ____ in