Question

The atmosphere and the hydrosphere are important parts of the oxygen cycle. Put the tiles in order to show the flow of oxygen through these spheres, starting with the absorption of carbon dioxide by plants. Which of the following options correctly represents the flow of oxygen through these spheres?

1) Photosynthesis releases oxygen into the atmosphere, combustion releases carbon dioxide into the atmosphere, respiration takes place, keeping animals alive, fossil fuels form, living organisms start to decompose.
2) Combustion releases carbon dioxide into the atmosphere, respiration takes place, keeping animals alive, fossil fuels form, living organisms start to decompose, photosynthesis releases oxygen into the atmosphere.
3) Living organisms start to decompose, photosynthesis releases oxygen into the atmosphere, combustion releases carbon dioxide into the atmosphere, respiration takes place, keeping animals alive, fossil fuels form.
4) Fossil fuels form, living organisms start to decompose, photosynthesis releases oxygen into the atmosphere, combustion releases carbon dioxide into the atmosphere, respiration takes place, keeping animals alive.

Answer 1

The flow of oxygen through the atmosphere and hydrosphere starts with photosynthesis by plants, followed by combustion, respiration, decomposition, and then the formation of fossil fuels.

Step-by-step explanation:

Based on the information provided, the correct order of the flow of oxygen through the atmosphere and hydrosphere is as follows:

1. Photosynthesis: Plants absorb carbon dioxide and release oxygen into the atmosphere.
2. Combustion: Combustion releases carbon dioxide into the atmosphere.
3. Respiration: Animals undergo respiration, using oxygen and releasing carbon dioxide.
4. Living organisms decompose: As living organisms die, they decompose, returning carbon dioxide and other compounds to the environment.
5. Fossil fuels form: Over long periods of time, organic matter can become buried and converted into fossil fuels.