Biogeochemical Cycles in Environmental Science

Front

What does 'biogeochemical' mean?

Back

Bio means 'Life', Geo means 'Earth', and Chemical refers to the elements that move through a cycle.

Front

What are biogeochemical cycles?

Back

They describe the movement of chemical elements through different media, such as the atmosphere, soil, rocks, bodies of water, and organisms.

Front

What is the fundamental principle of biogeochemical cycles?

Back

All matter cycles; it is neither created nor destroyed.

Front

How are biogeochemical cycles interconnected with the water cycle?

Back

The movement of water is critical for the leaching of sulfur and phosphorus into rivers, lakes, and oceans.

Front

List six of the most important biogeochemical cycles.

Back

1. Water 2. Carbon 3. Nitrogen 4. Phosphorous 5. Sulfur 6. Oxygen

Front

What are the main processes of the water cycle?

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1. Evaporation 2. Transpiration 3. Condensation 4. Precipitation 5. Surface Runoff

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What is the significance of the carbon cycle?

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It is crucial for recycling carbon, which is essential for life, and it helps maintain the balance of carbon in the atmosphere.

Front

What are natural sources of carbon?

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1. Death of plants and animals 2. Animal waste 3. Atmospheric CO2 4. Weathering 5. Methane gas from cows 6. Aerobic respiration.

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What human activities contribute to the carbon cycle?

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1. Burning wood or forests 2. Cars, trucks, planes 3. Burning fossil fuels.

Front

Why is nitrogen important for organisms?

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It is a key component of nucleic acids, proteins, and other organic molecules.