Carbon Cycle and Organic Chemistry Concepts

What two important elements can compost supply to plants, as highlighted in the video?

• Oxygen and Hydrogen

• Carbon and Nitrogen

• Phosphorus and Potassium

• Sulfur and Calcium

Which of the following is NOT mentioned as a form or component made of carbon in the video?

• Graphite (pencil lead)

• Diamond

• Water

• Carbohydrates

Which of the following is NOT listed as a major carbon reservoir where carbon can be found?

• The ocean

• Rocks

• The sun

• Living organisms

How do photosynthetic organisms, such as plants and algae, primarily obtain carbon from the environment?

• By consuming other organisms.

• By absorbing carbon dioxide from the atmosphere or dissolved in water.

• By breaking down fossil fuels.

• By releasing carbon dioxide through cellular respiration.

What process do both plants and animals perform that releases carbon dioxide back into the atmosphere?

• Photosynthesis

• Cellular Respiration

• Nitrogen Fixation

• Decomposition

What can happen to the carbon contained in dead plants and animals over a very long period of time?

• It is immediately released as oxygen.

• It is converted into fossil fuels.

• It evaporates into the atmosphere.

• It becomes inert and unusable.

Why is excessive carbon dioxide in the atmosphere a concern?

• It causes acid rain.

• It depletes the ozone layer.

• It is a greenhouse gas that can trap heat.

• It reduces plant growth.

Nitrogen is a critical element in which two types of biomolecules?

• Carbohydrates and Lipids

• Proteins and Nucleic Acids

• Vitamins and Minerals

• Water and Salts

Approximately what percentage of the atmosphere is made up of nitrogen gas?

• 21%

• 50%

• 78%

• 90%

What type of organisms are primarily responsible for converting atmospheric nitrogen into usable forms for plants?

• Fungi

• Animals

• Bacteria

• Algae