|Why are trees and plants green in color?|
|Question Date: 2013-03-20|
That´s a great question. Plants (everything
from tiny algae in the oceans to trees) have
green parts (or in some cases are completely
green). This is because they contain a green
pigment called chlorophyll which is necessary
for the plants to make food for themselves using
light energy and carbon dioxide (a gas in the
air) and water. The green pigment is able to
harvest the light energy, and use this energy to
change carbon dioxide plus water into sugars
that both pants and people eat!
That is a very cool question. To understand
it we need to know why anything that isn't
giving off light has color. Colors that we see
are light that is reflected from a surface and
not absorbed. That's why black things get hot in
the sun faster than white things. White is the
reflection of all types of light, while black
absorbs all colors. Plants have a color because
they also absorb light. Leaves are full of tiny
stuff called chlorophyll ("kloro-fill"). These
particles absorb most light but reflect green
light. That's why plants are green.
P.S. Chlorophyll is really important for
photosynthesis, the process by which plants turn
sunlight into sugar (energy).
Plants are green because they reflect green
light, and suck up red and blue light. The
chemical that does this is called
First of all, not all trees and plants are
green in color, but most are! The reason that
most of them are green has to do with the fact
that chlorophyll molecules are green.
Chlorophyll is the pigment that comprises
chloroplasts, which are the structures
or "organelles" responsible for converting the
sun's energy into useful energy for a plant. And
chlorophyll molecules happen to be green because
of their molecular structure.
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