Earth Science Cycles Quiz

What is the Earth system?

• C. The process of weathering and erosion

• B. The study of rocks and minerals

• D. The formation of mountains and valleys

• A. The natural processes that happen and interact on Earth

What does it mean that the Earth system is a closed system?

• C. It means that the Earth is constantly losing matter

• B. It means that the Earth is constantly gaining new matter

• A. It means that the Earth is not affected by outside forces

• D. It means that the material cycle between the atmosphere, hydrosphere, geosphere, and biosphere within the Earth system, but they don't really leave the system

What is the main ingredient of life on Earth?

• C. Nitrogen

• B. Carbon

• A. Oxygen

• D. Phosphorus

What is the process through which carbon constantly moves through the Earth's spheres called?

• A. The Nitrogen Cycle

• B. The Phosphorus Cycle

• C. The Water Cycle

• D. The Carbon Cycle

How does carbon make its way into the atmosphere?

• C. Through the process of combustion

• B. Through the process of respiration

• A. Through the process of photosynthesis

• D. Through the process of denitrification

What is the most common gas in Earth's atmosphere?

• D. Hydrogen

• B. Carbon Dioxide

• A. Oxygen

• C. Nitrogen

What is the first stage in the nitrogen cycle?

• A. Mineralization

• B. Fixation

• C. Nitrification

• D. Immobilization

What is the process called when nitrogen in the atmosphere moves into the soil?

• A. Weathering

• B. Evaporation

• C. Fixation

• D. Precipitation

What is the main ingredient in plant fertilizer?

• C. Phosphorus

• B. Carbon

• D. Oxygen

• A. Nitrogen

What is the first step of the phosphorus cycle?

• D. Denitrification

• B. Fixation

• C. Mineralization

• A. Weathering