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Earth's Energy Budget - Lesson Plan Day 1

Explore the concept of energy and budget in Earth's system, including the role of the Sun, albedo, clouds, and equilibrium. Engage in activities to understand the distribution of energy on Earth's surface.

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Earth's Energy Budget - Lesson Plan Day 1

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  1. Lesson Plan 2 – Day 1 Earth’s Energy Budget

  2. Earth’s Energy • Energy is the ability to change the surroundings • Examples: fuel for a car, ball falling from a window, electricity to turn on a light

  3. Budget • Budget is the amount of incoming or outgoing energy allocated to a system • Money • Time

  4. Equilibrium • Equilibrium is the state of balance between things • Emotional • Chemical reactions • Forces • Equilibrium means that the total amount may change over time, but the proportion in the budget parts stay fairly the same.

  5. Follow the Energy . . . . • SUN – EARTH Model • What in the model is the Sun? • What in the model is the Earth? • Where is the equator? • Where is the north pole? • Where are you?

  6. Input = Sunlight on one side of Earth Earth intercepts sunlight Sun emits radiation

  7. Sunlight is Energy Sunlight comes in a range of SHORT wavelengths called visible light

  8. Once the sunlight reaches the Earth’s surface, what happens?

  9. Reflected or Absorbed

  10. Follow the Energy

  11. Albedo = Reflection • How much is reflected? • Scale is 0-1 • White =1, • High reflectivity • Black = 0 • Low reflectivity • What do you think? High or low albedo? • Grass • Ice • Rocks • Asphalt • Concrete

  12. Albedo = Reflection

  13. Optional Video • http://www.youtube.com/watch?v=9UJKVa2ClCU&feature=related • Begin at 1:50. Researcher out on the ice, measuring albedo.

  14. CLOUDS • Clouds reflect sunlight and need to be included in the energy budget • Low thick clouds = high reflection, cools the surface • High thin clouds = lower reflection and other things (next class), warms the surface

  15. Input = Sunlight on one side of Earth Earth intercepts sunlight Sun emits radiation 30% is reflected

  16. What happens to the energy that enters the Earth system? Concept Map – additions • Sun or Sunlight • Earth • Energy Budget • Albedo

  17. End of Day

  18. What types of areas of Earth have - a high albedo? - a low albedo?(think urban, farmland, desert, etc.)

  19. Earth’s albedo Collected by NASA satellite and averaged. Does not include the ocean and no data for white areas.

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