Answer :
Final answer:
The stages of various environmental cycles can be matched with their descriptions. The cycles are influenced by human activity including deforestation, burning of fossil fuels, and overuse of nitrogen-based fertilizers.
Explanation:
The matching of the stages with their descriptions is as follows:
- When water returns to the atmosphere via plants: B. Transpiration
- A step in the carbon cycle that didn't really exist before the industrial revolution: G. Combustion
- When nitrogen gets captured from the atmosphere by bacteria or even lightning: M. Nitrogen fixation
- Water is absorbed underground and can be stored in aquifers: F. Infiltration
- Water is not absorbed underground but collects on the surface of the earth: E. Runoff
- Fungi and bacteria return nutrients from dead organisms to the soil: K. Decomposition
- Bacteria in the roots of plants convert nitrogen into usable forms, such as NO: M. Nitrogen fixation
- Organisms eat other organisms as a food source: J. Consumption
- Organisms capture sunlight and store the solar energy as chemical energy in molecules like carbohydrates: H. Photosynthesis
- When nitrogen is returned to the atmosphere by bacteria as N₂: O. Denitrification
- Water falls from the sky as snow, ice, or rain: D. Precipitation
- When organisms break down carbon-based molecules for energy and release CO₂ as a result: I. Cellular respiration
Human impact on each of the cycles can be represented as:
- Water cycle: Deforestation leading to increased runoff and reduced transpiration.
- Carbon cycle: Burning fossil fuels, releasing excess CO₂ into the atmosphere.
- Nitrogen cycle: Excessive use of nitrogen-based fertilizers leading to water pollution.
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