1. Earth’s Atmosphere

2. Troposphere  Lowest layer 6-10 miles high  We live in this layer  6-10 miles from Earth  Weather, wind, clouds, Jet stream Jet stream

3. Stratosphere  10-30 miles high  Includes ozone layer to protect life  Slows radiation  Higher temperature than troposphere troposphere

4. Mesosphere  30 to 50 miles high  Colder than Stratosphere  Meteors disintegrate in this layer this layer

5. Thermosphere  50-350 miles high, thin ozone layer  2000 degrees C.  Also called Ionosphere, atoms have electrical atoms have electrical charges. charges.

6. Exosphere  Unstable molecules escape into space

7. The Big Picture  Why do we care that the earth has different layers?  http://academic.cengage.com/biology/discipl ine_content/animations/sun_to_earth.html http://academic.cengage.com/biology/discipl ine_content/animations/sun_to_earth.html http://academic.cengage.com/biology/discipl ine_content/animations/sun_to_earth.html

8. Resource/Exploration Five Layers : http://earthguide.ucsd.edu/earthguide/diagrams/at mosphere/index.html http://www.srh.noaa.gov/jetstream/atmos/layers.ht m

9. Convection  Convection is the transfer of heat by the actual movement of the heated material.  Convection Currents are what causes weather

10. Density how much something of a set volume weighs. This is generally measured by taking a cubic centimeter of a substance. So from the above examples it is easy to see that some of the cubes weigh more than others, even though they all take up the same amount of space. This agrees with our experience. We know that a huge block of foam is easier to lift than the same size block of wood or metal. Now we can see that the foam block is less dense than the others, making it easier to lift.

11. Resource/Exploration  Convection: http://uccpbank.k12hsn.org/courses/APEnvir onmentalScience/course%20files/multimedi a/lesson21/animations/2d_Air_Movement.ht ml http://uccpbank.k12hsn.org/courses/APEnvir onmentalScience/course%20files/multimedi a/lesson21/animations/2d_Air_Movement.ht ml http://uccpbank.k12hsn.org/courses/APEnvir onmentalScience/course%20files/multimedi a/lesson21/animations/2d_Air_Movement.ht ml