Question

which process involves the breakdown of phosphate rocks, releasing phosphate ions into the soil and water? a. decomposition b. assimilation c. silting d. weathering which cycle involves the movement of water between the atmosphere, land, and oceans? a. water cycle b. phosphorus cycle c. carbon cycle d. nitrogen cycle which activity disrupts the carbon cycle by releasing large amounts of carbon dioxide into the atmosphere? a. reforestation b. deforestation c. conservation d. combustion

Explanation:

1. Weathering is the process that breaks down rocks, including phosphate - rocks, releasing phosphate ions into soil and water. Decomposition is the breakdown of organic matter, assimilation is the uptake of nutrients by organisms, and silting is the deposition of sediment.
2. The water cycle involves the movement of water between the atmosphere, land, and oceans. The phosphorus cycle is about the movement of phosphorus, the carbon cycle is about carbon, and the nitrogen cycle is about nitrogen.
3. Combustion, such as burning of fossil - fuels, releases large amounts of carbon dioxide into the atmosphere, disrupting the carbon cycle. Reforestation absorbs carbon dioxide, deforestation reduces carbon - sequestering capacity but combustion is a more direct source of carbon - dioxide release in this context, and conservation helps maintain the balance of the carbon cycle.

Answer:

1. d. Weathering
2. a. Water Cycle
3. d. Combustion