1) What converts nitrogen gas into a usable form for plants and animals? a) Wind b) Fungi c) Bacteria d) Clouds 2) Phosphorus is an element that is essential for the growth and development of organisms. a) True b) False 3) What form of nitrogen is easily absorbed by the plants from the soil? a) Ammonia b) Decomposed matter c) Nitrogen Gas d) Nitrates 4) What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere? a) Nitrification b) Denitrification c) Both d) None 5) Weathering and erosion of ___________ slowly add Phosphorus to the long-term Phosphorus cycle. a) Snow b) Water c) Rocks d) Metals 6) In nature, Phosphorus is present in high amounts in soil and water. a) True b) False

Nitrogen & Phosphorus Cycle

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النمط البصري

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