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Understanding the Earth's Atmosphere: Importance and Effects

Learn about the Earth's atmosphere, its composition, functions, and importance for sustaining life. Explore the greenhouse effect, ozone layer, and the role of greenhouse gases in regulating the planet's temperature.

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Understanding the Earth's Atmosphere: Importance and Effects

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  1. Warm Up How long can a human survive without: • Air? • Water? • 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. The Atmosphere All gases that surround Earth’s surface

  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. Why is the atmosphere important for life on Earth? • Provides necessary gases for life • CO2 – photosynthesis, greenhouse gas • O2 – Cellular respiration • Protection from harmful radiation, meteors • Warmth- keeps Earth habitable through the greenhouse effect

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

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

  8. 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

  9. The Greenhouse Effect Greenhouse Effect: warming of the Earth’s surface that occurs when CO₂, water vapor and other gases absorb and re-radiate the solar radiation

  10. How does the atmosphere keep us warm?

  11. 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

  12. Cons The Greenhouse Effect Pros Keeps Earth warm enough for life to sustain Too many greenhouse gases = global warming

  13. Greenhouse Effect Lab https://youtu.be/ZzCA60WnoMk

  14. Atmosphere Stations- 20 min/stn 1- Layers Foldable 2- Heat Transfer Demos 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 • Use text and online sources to create your own foldable in your journal • Phones and desktop computers are OK for research if needed

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