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Light Spread
http://academic.cengage.com/resource_uploads/static_resources/0534397719/1406/Ahrens3-2LightSpread.swf

Cengage Learning

This is a simple interactive of a flashlight shining on a surface that can be manipulated to represent the sun's angle of incidence on Earth, to demonstrate how light intensity increases and decreases based on that angle.

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Learn more about Teaching Climate Literacy and Energy Awareness»

Climate Literacy
About Teaching Climate Literacy

The tilt of Earth’s axis relative to its orbit around the Sun results in predictable changes in the duration of daylight and the amount of sunlight received at any latitude throughout a year. These changes cause the annual cycle of seasons and associated temperature changes.
About Teaching Principle 1
Other materials addressing 1c

Energy Literacy

Sunlight, gravitational potential, decay of radioactive isotopes, and rotation of the Earth are the major sources of energy driving physical processes on Earth.
Other materials addressing:
2.2 Sources of energy on Earth.
Physical processes on Earth are the result of energy flow through the Earth system.
Other materials addressing:
Physical processes on Earth are the result of energy flow .

Benchmarks for Science Literacy
Learn more about the Benchmarks

Because the earth turns daily on an axis that is tilted relative to the plane of the earth's yearly orbit around the sun, sunlight falls more intensely on different parts of the earth during the year. The difference in intensity of sunlight and the resulting warming of the earth's surface produces the seasonal variations in temperature.
Explore the map of concepts related to this benchmark

Notes From Our Reviewers The CLEAN collection is hand-picked and rigorously reviewed for scientific accuracy and classroom effectiveness. Read what our review team had to say about this resource below or learn more about how CLEAN reviews teaching materials
Teaching Tips | Science | Pedagogy | Technical Details

Teaching Tips

  • This interactive could be used in conjunction with an inquiry set-up for students to measure the sun's intensity on solar panels at different times of the day.

About the Science

  • An interactive that relates solar incidence angle to amount of energy absorbed on Earth's surface.

About the Pedagogy

  • Interactive demonstrates clearly a concept that is difficult for students to understand.

Technical Details/Ease of Use

  • Interactive is from C. Donald Ahrens' Meterology Today textbook.
  • Standalone may not operate functionally on some browsers.

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