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. Photosynthesis releases oxygen into the atmosphere. Living organisms start to decompose. Combustion releases carbon dioxide into the atmosphere. Respiration takes place, keeping animals alive. Fossil fuels form.

Answer 1

The flow of oxygen through the atmosphere and hydrosphere starts with plants absorbing CO2 for photosynthesis, followed by respiration in animals, decomposition, the formation of fossil fuels, and combustion releasing CO2 back into the atmosphere.

Step-by-step explanation:

The oxygen cycle involves various processes that move oxygen through the atmosphere and hydrosphere. Here's the correct order to show the flow of oxygen starting with the absorption of carbon dioxide by plants:

1. Photosynthesis by plants removes carbon dioxide from the atmosphere and uses it to make organic compounds, releasing oxygen into the atmosphere.
2. Respiration by animals and other organisms takes place, using up oxygen and releasing carbon dioxide back into the atmosphere, keeping them alive.
3. Living organisms begin to decompose after death, releasing carbon dioxide back into the atmosphere and into the hydrosphere.
4. Over time, the carbon-rich remains of organisms can form fossil fuels.
5. Combustion of these fossil fuels (or any organic material) releases carbon dioxide into the atmosphere.

These steps represent a simplified version of the oxygen cycle, where photosynthesis and cellular respiration play crucial roles in the carbon cycle, which is closely linked with the oxygen cycle.

Answer 2

Here's the correct order to show the flow of oxygen through the atmosphere and hydrosphere:

1. Absorption of carbon dioxide by plants.

2. Photosynthesis releases oxygen into the atmosphere.

3. Respiration takes place, keeping animals alive.

4. Living organisms start to decompose.

5. Fossil fuels form.

6. Combustion releases carbon dioxide into the atmosphere.

This sequence illustrates how oxygen is produced, consumed, and cycled through both the atmosphere and the hydrosphere.