|How do plants grow from sunlight?|
|Question Date: 2018-02-23|
Chandler, plants breathe carbon dioxide through
little pores on their bodies called
stomata. The carbon dioxide is sent to
their energy making centers, called
chloroplasts. They also take water from the
soil through their roots. In the plant cells,
carbon dioxide and water combine to create oxygen
and glucose. The plants don’t need oxygen, so
they let it go, so we can breathe it! The
glucose is kind of like sugar, and plants use it
for food. Sunlight is important because it
provides the energy the plant needs to
stick carbon dioxide and water together.
Sunlight gives plants energy - actual tiny
packets of energy to jump-start reactions between
very small particles inside the plant. These
reactions help plants make other small particles
they need to breathe (in the case of plants
needing carbon dioxide or other gases), to
eat (absorb and break down nutrients to make other
things), and to expel waste (funnel products of
their "eating" and "breathing" out of themselves).
Many of the small particles made with the help
of sunlight make up parts of the plant stalk and leaves, and by accumulating more cells in its stalk and leaves, a plant grows taller, larger, and more mature.
Sugar contains energy. You burn sugar to power
your body's functions. You get the sugar you burn
from the food you eat, or by breaking down
proteins and fats in the foods. Plants don't eat
foods that contain enough sugar or energy to live.
So, in order to get energy, they take it from
sunlight. They have a chemical called
in their leaves (it's the same chemical that gives
plants their green color), and this chemical is
able to take energy from sunlight, much like the
chemicals in your eyes that collect light that you
use to see. Unlike your eyes, a plant's leaves use
the sun's energy to create sugar, which the plant
then uses to build itself and to live on during
the night when there is no sunlight.
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