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Oxygen-Carbon Dioxide Cycle

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by

roselyn elorde

on 4 March 2014

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Transcript of Oxygen-Carbon Dioxide Cycle

Direction:
Guess the corresponding letter of the number in the alphabet.
Oxygen-Carbon Dioxide Cycle
15,24,25,7,5,14
3,1,18,2,15,14
4,9,15,24,9,4,5
18,5,19,
16,9,18,1,
20,9,15,14
Respiration
Oxygen
Carbon
Dioxide
Respiration
16,8,15,20,
15,19,25,14,
20,8,5,19,9,19
Photosynthesis
1,14,9,13,1,12,19
animals
16,12,1,14,20,19
plants
Organisms use and produce gases in photosynthesis and respiration.
These gases flow through organisms and the environment in a cyclic process called the
oxygen-carbon dioxide cycle
.
The oxygen-carbon dioxide cycle shows the interdependence among organisms for these important gases.
When plants photosynthesize, they use carbon dioxide and produce oxygen.
Oxygen produced by plants in photosynthesis is used by animals when they respire; animals in turn produce carbon dioxide.
Animals take in oxygen from the atmosphere and give off carbon dioxide during
respiration
.
This occurs day and night.
Plants, however, give off oxygen and take in carbon dioxide when they photosynthesize during the day.
At night, when plants are in darkness and cannot photosynthesize, they "breath" just like animals.
They take in oxygen and give off carbon dioxide.
Plants and animals depend on each other. for these important gases.
Plants produce oxygen needed by animals.
In turn, animals produce carbon dioxide needed by plants.

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