5th: br-Biosphere: Nutrient Cycle

What is the primary source of energy for the nutrient cycle?

• Sun

• Moon

• Rivers

• Wind

Name the process by which plants absorb nutrients from the soil.

• Soil ingestion

• Root absorption

• Stem intake

• Leaf absorption

Which nutrient is often a limiting factor for plant growth in aquatic ecosystems?

• Phosphorus

• Nitrogen

• Carbon

• Oxygen

Explain the role of decomposers in the nutrient cycle.

• Decomposers have no impact on the nutrient cycle

• Decomposers break down organic matter into simpler compounds, releasing nutrients back into the environment.

• Decomposers reduce the nutrient content in the environment

• Decomposers create organic matter from simple compounds

What is the difference between the carbon cycle and the nitrogen cycle?

• The carbon cycle is a fast process, while the nitrogen cycle is a slow process.

• The carbon cycle occurs in the atmosphere, while the nitrogen cycle occurs in the oceans.

• The carbon cycle involves nitrogen, while the nitrogen cycle involves carbon.

• The carbon cycle involves carbon, while the nitrogen cycle involves nitrogen.

How do humans impact the nutrient cycle?

• Humans impact the nutrient cycle through space exploration

• Humans impact the nutrient cycle by communicating with animals

• Humans impact the nutrient cycle through activities like deforestation, agriculture, and pollution.

• Humans impact the nutrient cycle by building underwater cities

Why is phosphorus important in the nutrient cycle?

• Phosphorus is harmful to the environment

• Phosphorus is only important for animal growth

• Phosphorus has no role in the nutrient cycle

• Phosphorus is essential for plant growth, energy transfer, and is a limiting nutrient in many ecosystems.

Describe the role of bacteria in the nitrogen cycle.

• Bacteria convert nitrogen into carbon dioxide in the nitrogen cycle.

• Bacteria convert atmospheric nitrogen into oxygen in the nitrogen cycle.

• Bacteria convert nitrogen into phosphorus in the nitrogen cycle.

• Bacteria convert atmospheric nitrogen into a usable form for plants in the nitrogen cycle.

What happens to excess nutrients in an ecosystem?

• Eutrophication can occur, causing algal blooms and harm to aquatic life.

• Nutrients are evenly distributed throughout the ecosystem

• Excess nutrients have no impact on the ecosystem

• Excess nutrients are stored in the soil indefinitely

How does the nutrient cycle contribute to ecosystem sustainability?

• The nutrient cycle contributes to ecosystem sustainability by recycling essential nutrients and maintaining nutrient balance.

• The nutrient cycle contributes to ecosystem sustainability by promoting the extinction of key species and disrupting the food chain.

• The nutrient cycle contributes to ecosystem sustainability by depleting essential nutrients and disrupting nutrient balance.

• The nutrient cycle contributes to ecosystem sustainability by introducing harmful pollutants and toxins into the environment.