1. Weather Unit Foldable In the upper right hand corner write
Your name
Today's date
Core

2. Yellow Paper Title The Atmosphere
What is the atmosphere?
What is the function of the atmosphere?
The atmosphere is
layers of gasses that
surround the Earth.
Earth’s atmosphere has
two main functions: 1st it
contains gas like O2 that
we need to live and 2nd it
traps heat so the water on
the planet remains liquid.

3. The Atmosphere What gases are in the atmosphere?
There are 2 main gases
in the atmosphere
1st Nitrogen 78%
2nd Oxygen 21%.
All other gases make up
the other 1%.

4. Green Air Pressure What is air Pressure? What is Barometric pressure?
The result of the weight
of a column of air pushing
down on an area.
Changes in the atmospheric pressure as shown by a barometer

5. Air Pressure What are the Properties of air? Altitude/Elevation
How does altitude affect air pressure and density?
Air has mass, density, and pressure.
The distance above sea level. (the surface of the ocean)
The higher the altitude the lower the air pressure and denisty
The lower the altitude the greater the air pressure and density.

7. Blue Title Layers of the Atmosphere
How many layers are there in the atmosphere?
There are 5 layers, the troposphere, stratosphere, mesosphere, thermosphere, and exosphere,

8. Layers of the Atmosphere
Troposphere:
- This is the layer we live in and the smallest layer
Temperature decreases as altitude increases 140 to - 76 degrees F
All weather happens here
This is the ONLY layer living things can live in
16 km above sea level

9. Layers of the Atmosphere
Stratosphere:
Temperature increases as altitude increases from -76 to 32 degrees F
- Ozone layer found here, and weather Balloons
50 km above the earth

10. Layers of the Atmosphere
Mesosphere:
- Temperature decreases to coldest point 32 to -130 degrees F.
- Meteor Showers
- 50 to 90 km

11. Layers of the Atmosphere
Thermosphere:
- Temperature increases 2700 degrees F
- Aurora borealis (Northern lights), International Space Station, Space Shuttle stay in this layer.
- 90 to 500 km from sea level

12. Layers of the Atmosphere
Exosphere:
- Temperature Increases to 5000 degrees F
- Satellites orbit here
- 500 km + from sea level

13. White title Air Masses and air Fronts
There are 4 types of air masses classified by temperature, and humidity.
A huge body of air that has similar temperature, humidity, and air Pressure.
Tropical: warm
Polar: cooled
Continental: dry
Maritime: wet

16. White Title Air Masses and Fronts
What is a Front?
There are three main types of Fronts
An area where air masses meet and don’t mix.
Cold Front
Warm Front
Stationary Front

20. Air Masses and Fronts
Cold Front: Cold air moves underneath warm air, forcing warm air to rise.

21. Air Masses and Fronts
Warm Front: Forms when warm air moves over cold air.

22. Air Masses and Fronts
Stationary Front: happens when a cold and warm air mass meet and don’t move.

23. White Title

24. White Title Weather Factors
Radiation: the transfer of energy by electromagnetic waves
Conduction: heat transferred through a substance by the direct contact of molecules.
Convection Currents: the transfer of heat by the movement of a heated fluid.

25. White Title Weather Factors
Weather is caused by heat energy, moister, wind, air pressure.
The ozone layer absorbs powerful ultraviolet radiation from the sun.
Green house effect: process by which gases hold heat in the air. CO2

26. White Title Weather Factors
Temperature: the average amount of energy of motion of the molecules of a substance.
Heat: the transfer of energy from a hotter substance to a cooler one.

27. Blue Title Wind
Wind: the horizontal Movement for air from an area of high pressure to an area of low pressure.
All wind is caused by differences in air pressure.
Wind is named by the direction from which it comes from.

28. Blue Title Wind
Jet Stream bands of high-speed winds about 10km above earth’s surface.
Prevailing Westerlies: mid-latitude, wind that blow from West to East.

29. Green Title Precipitation
Precipitation: any form of water that falls from the clouds and reaches Earth’s surface. (liquid or solid)
There are 5 common types of precipitation
Water
Sleet
Freezing Rain
Hail
snow

30. Green Title Precipitation
Humidity: measure of the amount of water vapor in the air
Water vapor: water in the form of a gas
Moist air is more dense then dry air
Liquid water in more dense then water vapor
Warm air holds more water vapor then cold air