Carbon and Oxygen and You: Explained

The video explains the oxygen cycle, highlighting how oxygen is absorbed by the lungs, used in cells, and transformed into water. It discusses the role of water in photosynthesis, where plants convert CO2 into carbohydrates. The cycle continues as humans consume these carbohydrates, breaking them down in cells to release CO2, which is then exhaled and taken up by plants again.

What happens to the oxygen you breathe in once it reaches your cells?

• It is converted into carbon dioxide.

• It is turned into water.

• It remains as oxygen.

• It is stored in the cells.

Which element is released during the light reactions of photosynthesis?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon dioxide

What is the primary role of photosynthetic organisms in the carbon cycle?

• To absorb oxygen

• To convert carbon dioxide into carbohydrates

• To produce nitrogen

• To release carbon dioxide

During cellular respiration, what happens to the sugars inside our cells?

• They are converted into oxygen.

• They are broken down into smaller molecules.

• They are stored as fat.

• They are used to build proteins.

What is the final destination of carbon dioxide produced in the citric acid cycle?

• It is stored in the cells.

• It is converted back into glucose.

• It is exhaled out into the world.

• It is used to produce water.