Why is Grass Green?
Like many plants, most species of grass produce a bright pigment called chlorophyll. Chlorophyll absorbs blue light (high energy, short wavelengths) and red light (low energy, longer wavelengths) well, but mostly reflects green light, which accounts for your lawn's color.
But chlorophyll isn't just for eye candy. It also figures importantly in the process of photosynthesis, by which plants convert an inorganic material (light) into a useable, organic one (sugar). Chlorophyll molecules absorb quanta of light and transfer the energy to special molecules that can, when stimulated, fire off an electron that causes chemical changes in the plant. Further processes turn the chemical energy into sugar.
While grass can just sit there and grow, we poor animals have to hunt down our food, which may seem a trifle unfair by comparison. But then, the grass is always greener …
Life's Little Mysteries: Gift Edition Hardcover Book
Uncover the truth behind more than 100 mysteries that surround us every day with our new hardcover book! Perfect for gifts and classrooms, and suitable for all ages. Some of the included mysteries are:
- Why Do Cats Land on Their Feet?
- How Long Does it Take to Make Petrified Wood?
- What Everyday Things Around Us Are Radioactive?
Find out all of this and much, much more in our NEW hardcover book.
It makes a great gift idea for all ages. more info>>