Why Do Leaves Change Color in the Fall?
Visit this site to find out why tree leaves change color each fall. This site gives a simple explanation of this phenomenon. You can learn about the pigments that give leaves their colors by scrolling down to projects to do together. Try an experiment yourself by doing Project One and separate colors in a green leaf using chromatography.

Why Leaves Change Color
Go to this site to find out why leaves change color in the fall. Scroll down to learn about pigments other than chlorophyll that can be found in plant leaves. Scroll down to find out how weather affects autumn colors. What two factors influence the brilliance of fall colors?

Why Do Leaves Change Color?
At this site by the Wisconsin Department of Natural Resources you can read a simple explanation about how leaves change color in the autumn. Scroll down to see if you can identify a tree from its colors. What colors do oak trees usually exhibit in the fall?

Archimedes’ Principle
Visit this site by Northwestern State University of Louisiana to learn who Archimedes was and when he lived. This site describes Archimedes’ principle and provides links to other simple physics activities that illustrate this principle. Does Archimedes’ principle apply only to liquids?

Archimedes’ Principle
Go to this site by the Learning Network to learn more details about Archimedes’ principle. What is specific gravity? How does specific gravity relate to Archimedes’ principle?

Archimedes’ Principle
At this site you can read more about Archimedes’ principle. Have you ever seen large, heavy ships on the open ocean? Why doesn’t a ship that is heavier than water sink? You can answer that question at this site.

Volume Displacement
Visit this site to learn more about the methods used to determine the volume of an irregular object. Who first discovered that water displacement can be used to measure volume? Scroll down and try the experiment to measure the volume of three irregularly shaped objects.

Using the "Water Displacement Method" to Determine the Volume of an Irregularly Shaped Object
Go to this site to learn more about the procedure used to determine the volume of an irregularly shaped object. Scroll down to find out why you should determine an object’s mass before determining its volume using water displacement.

So You Want to be an Astronaut
Go to this NASA site to find out how to become an astronaut. Most of the pilot/commander positions with the space shuttle have traditionally been filled by men who have served in the U.S. Armed Forces. How many hours of flight time flying jet engines does a pilot need before he can be considered a candidate for astronaut training?

How to Become an Astronaut
Visit this site to find out more about becoming an astronaut. Visit some of the links on this site to learn what is needed to apply to be an astronaut. Use this information to make a brochure that explains the process to the rest of the class.