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Investigation 5:
The Sun and Its Central
Role in Our Solar System

This investigation will help you to:

To learn more about how Earth receives energy from the sun, visit the following web sites:

Length of Planet Earth’s Day and Night,
Don Ion
This Flash animation (best to use Internet Explorer as the browser) shows the seasonal variation in the circle of illumination viewing the north pole. An inset shows the earth’s revolution around the sun. This is an excellent way to explain for changes in daylength with season.

To learn more about how life on Earth is dependent upon energy from the sun, visit the following web sites:


To learn more about the sun as a star, visit the following web sites:

Evolution of a Star about the Size of a Sun,
Charles Burrows
Watch the evolution of a star similar to our sun with the H-R diagram as a backdrop with this animation.



Investigation 1

Investigation 2

Investigation 3

Investigation 4

Investigation 5

Investigation 6

Investigation 7

Investigation 8

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Last updated: January 26, 2009

This project is supported, in part, by the National Science Foundation and the AGI Foundation. Opinions expressed are those of the authors and not necessarily those of the Foundation.

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