1. Layers of the Atmosphere Fill in your notes as we move through…..prepare to answer questions.

2. Aim and HW AIM: Describe the layers of the Earth’s atmosphere HW: 1) Quiz on Monday 2) Test corrections due Friday 3) Complete worksheet

3. DO NOW In your EcoLog, explain how humans interact daily with the atmosphere Pass up Layers of Atmosphere Lab (per 1/2)

4. Gases in the Atmosphere Nitrogen =78% Oxygen = 21% Argon = 0.9% Trace = 0.1%

5. Greenhouse Gases Carbon Dioxide (CO 2 ), Methane (CH 4 ), Water Vapor (H 2 O). Heat trying to escape the Earth through the atmosphere is blocked.

6. Think, Pair, Share Are greenhouse gases a good thing or a bad thing? Why?

7. The Troposphere(0-12Km) The layer that HUGS the surface of the Earth. Warmest at the surface and gets colder as you move up….Have you ever been to the top of the Empire State Building in the summer? WEATHER & CLOUDS About 12 KM in height. Tropopause – Highest Boundary where temps stay at ~-45 0 C

9. The Stratosphere(14-50 Km) OZONE (O 3 ) Layer is found here. Earth’s SUNBLOCK, it absorbs harmful UV light before it reaches the surface. Temperatures rise as you move higher in the stratosphere………weird…..why? Statopause – Uppermost boundary

10. The Mesosphere(~53 – 85Km) Meteors burn in the Mesosphere….. Again, temperatures decrease……why? Mesopause – Uppermost boundary

11. Thermosphere (~87 - ???Km) THERMOS = HEAT Temperatures in the upper Thermosphere can exceed 2000 0 C……….why are we not on fire???? Aurora’s…….. Northern Lights…..what causes them?

14. Wrap it up The Earth’s atmosphere works like a quilt, it keeps the Earth warm by trapping heat. Greenhouse gasses are responsible for the trapping of the heat. The Earth warms itself from the GROUND UP, not from the top down. This is, again, the same way a quilt works.......YOU warm the air under the quilt and the quilt traps that heat. There are 4 major layers of the atmosphere. Each layer has distinct properties. Each layer is separated from the next layer by a PAUSE……temperatures stay stable in the PAUSES.

15. Animation http://earthguide.ucsd.edu/earthguide/diagrams/atmosp here/index.html http://earthguide.ucsd.edu/earthguide/diagrams/atmosp here/index.html

16. CLOSURE We’ve learned that we interact with the atmosphere on a daily basis. What do you think – do our interactions have a positive or negative effect on the atmosphere? Explain your answer.