1. CARBON- 0XYGEN CYCLE
According to LocustValley CentralSchoolDistrict,the carbon
dioxide-oxygencycle is the process through which carbondioxide
and oxygen move through the naturalenvironmentby
photosynthesis,respiration,combustionand decomposition. Plants
and animals are important to the carbon dioxide-oxygencycle.
FULL ANSWER
During photosynthesis, plants absorb carbon dioxide through
openings in their leaves. In the chlorophyll or green pigment in the
leaves, the carbon dioxide, along with water and sunlight, is
converted to sugar, used for energy in the plant, and oxygen and
water vapor, which are released into the air. During respiration,
animals breathe in the oxygen in the atmosphere and use it along
with food to create energy. This process releases carbon dioxide
which animals release into the air. Combustion is any source of
burning, such as fires, volcanoes and using fossil fuels for energy,
which also releases carbon dioxide into the air. Decomposition is
when dead plants and animals breakdown. This returns the
carbon dioxide and oxygen from the plant or the animal's body
back to the environment.
