Question

1. if the air contains high levels of pollutants what effect might this have on water quality?
2. the water cycle, like the other cycles, is a \closed system.\ what does that say about the importance of keeping the water on earth free from pollution?

extension questions

1. which process(es) of the water cycle - precipitation, evaporation, condensation, run - off, percolation or transpiration might contribute to the addition of pollutants to rivers, lakes and oceans? why?

Explanation:

1. Pollutants in air can fall with precipitation, contaminate water sources through deposition, and cause acid - rain which degrades water quality.
2. In a closed system like the water cycle, once water is polluted, it continuously recirculates, spreading contaminants. Keeping it clean is crucial to avoid long - term and widespread pollution.
3. Precipitation can carry air pollutants into water bodies. Run - off can pick up pollutants from land surfaces like chemicals, waste. Percolation can carry soil - bound pollutants into groundwater which may feed into surface water bodies.

Answer:

1. Pollutants in air can contaminate water through deposition and acid - rain, degrading water quality.
2. Since the water cycle is a closed system, polluted water will keep recirculating, highlighting the importance of keeping it clean.
3. Precipitation, run - off, and percolation can contribute to adding pollutants to water bodies as they can carry air, land, and soil - bound contaminants respectively.