Why do apple slices turn brown? The peel of an apple prevents oxygen from coming in contact with the chemicals inside the apple. Cutting an apple breaks the cells of the apple. Thus the broken cells on the cut surface of the apple are exposed to oxygen in air. There are a series of chemical […]
Pigment in Fall Leaves
This kit contains chemical coated labels that change color with temperature fluxuations. In designing the labels, I created color combinations that modeled color changes in fall leaves. For example, some green leaves turn yellow in the fall. Leaves are green due to the presence of the green pigment called chlorophyll. The yellow color in leaves […]
How a Chameleon’s Skin Changes Color
What Happens Inside a Chameleon that Changes Its Skin Color? New Terms light energy pigment transparent visible light white light Chameleons are so cool! Think about having skin that changes color when there is a change in temperature, or if you get excited –upset–mad–don’t feel well. We would not be able to “hide […]
Sun Blockers
Natures Natural Sunblockers Some of the organisms in the icy waters of the Antarctic Ocean have a natural sun-blocker. What is this substance? Answer: Pigments (coloring substances) in living organisms, such as melanin in human skin, can also protect them from UVL. The young girl on the left in the picture above has very little […]
Night Vision
Question: Why can nocturnal animals, such as owls and cats, have better night vision than daytime hunters? Answer: Animals that hunt at night have more rods in their eyes than do other animals, including you. So what are rods? The retina is the back innermost part of the eye of animals. In the retina are […]