Beakman explains that light is made up various colors using ROY G BIV and a prism. He then explains that, like a radio with different stations at different frequencies, light has various wavelengths for each color. Then Beakman uses an animation clip to explain light scattering to show why the sky is blue during the day and pink and orange at dawn and dusk.
Hoggish Greedly is clear cutting a forest, which loosens the soil as there are no roots to hold the soil in place. The Planeteers take advantage of this and show Hoggish Greedly the effects of water erosion on loose dirt.