Nutrient Cycles and Water Cycle

This video lesson covers the nutrient cycles in the biosphere, including the water, carbon, nitrogen, and phosphorus cycles. Each cycle is explained in terms of its components and processes, such as evaporation, photosynthesis, nitrogen fixation, and sediment breakdown. The video emphasizes the importance of these cycles in maintaining ecological balance and highlights the roles of various natural processes and organisms in facilitating these cycles.

Which of the following cycles involves the movement of water between the ocean, atmosphere, and land?

• Water Cycle

• Phosphorus Cycle

• Carbon Cycle

• Nitrogen Cycle

What process in the water cycle involves water being absorbed by plant roots and released into the atmosphere?

• Precipitation

• Transpiration

• Evaporation

• Condensation

In the carbon cycle, what is the primary form of carbon found in the atmosphere?

• Methane

• Calcium Carbonate

• Carbon Monoxide

• Carbon Dioxide

Which process in the carbon cycle involves plants using carbon dioxide to produce energy?

• Respiration

• Photosynthesis

• Combustion

• Decomposition

What percentage of the Earth's atmosphere is composed of nitrogen gas?

• 10%

• 50%

• 78%

• 21%

Which process converts nitrogen gas from the atmosphere into ammonia in the soil?

• Nitrification

• Ammonification

• Denitrification

• Nitrogen Fixation

In the nitrogen cycle, what is the process called that converts nitrates back into nitrogen gas?

• Denitrification

• Nitrification

• Assimilation

• Nitrogen Fixation

Which nutrient cycle does not involve a significant atmospheric component?

• Water Cycle

• Nitrogen Cycle

• Phosphorus Cycle

• Carbon Cycle

Phosphorus is essential for the formation of which biological molecules?

• Lipids

• Proteins

• Carbohydrates

• DNA and RNA

Where is phosphorus primarily found in the environment?

• Oceans as dissolved gases

• Phosphate rocks and soil minerals

• Atmosphere

• Fossil fuels