1. Warm Up How long can a human survive without: a) Air? b) Water? c) Food?

2. Rule of 3 Air- 3 minutes Water- 3 days Food- 3 weeks Which of these 3 would be considered the most precious resource?

3. All gases that surround Earth’s surface The Atmosphere

4. What is the atmosphere? All of the gases that surround Earth Create an insulating “blanket” around the planet that keep the temperature within a constant range Has changed composition throughout Earth’s history- even now

5. What gasses are in the atmosphere? Nitrogen 78% Oxygen 21% Other 1% Other includes Argon, Carbon Dioxide, Methane, Ozone, and Water Vapor

6. The atmosphere also contains solids – called “aerosols”

7. Where is the Ozone layer and what does it do? Ozone layer is in the stratosphere The ozone layer absorbs UV radiation from the Sun. UV radiation is part of the electromagnetic spectrum. Exposure to UV radiation can lead to skin cancer

8. Heat Transfer

9. How does the atmosphere keep us warm?

10. What are greenhouse gasses? Any gas that can absorb outgoing radiation from earth and radiate it back toward the surface of the planet Includes Carbon Dioxide, Nitrous Oxide, Water Vapor, and Methane Keeps Earth’s average temperature @ 55°F

11. Why is the atmosphere important for life on Earth? Provides necessary gases for life CO 2 – photosynthesis, greenhouse gas O 2 – Cellular respiration Protection from harmful radiation, meteors Warmth- keeps Earth habitable through the greenhouse effect

12. Atmosphere Stations- 20 min/stn 1- Layers Foldable2- Heat Transfer Demos Use text and online sources to create your own foldable in your journal computers are OK for research if needed Radiation, Conduction, Convection 2 set-ups: Heat Lamp and Thermometer Confetti – Beaker – Hot plate Diagram and Labels with explanations of where and how heat is being transferred