Did you ever notice that bugs that splat on your windshield have different colored blood?  Bug blood is called hemolymph.  It is clear and composed mostly of water.  It is tinged with color, depending on what the bug eats.  If the blood is green, the bug ate leaves.  If the blood is yellow, it ate [...]

One of the most obvious changes in seasons occurs in the fall when the leaves of deciduous trees turn color and fall off. Evergreen trees remain green and lush. Have your carschoolers collect one specific kind of leaf and do some research on that tree. They can make sketches or photograph the tree at each [...]