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10 Cards in this Set
- Front
- Back
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Percentage of different water |
On earth 97.5% is salt water and 2.5% is fresh water. 70% of earth's fresh water is tied up in polar ice and glaciers. Remaining 30% is found in ground water,surface waters, the atmosphere and soil |
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What's water cycle |
•Evaporation/transpiration •percolation into the ground •surface runoff |
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Runoff |
Excessive rain or snowmelt can produce overland flow to creeks and ditches. |
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Water table |
Is the level at which water stands in a shallow well |
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Acid |
A substance that releases hydrogen ion when dissolved in water. Most acids will dissolve the common metals and react with a base to form a neutral salt and water |
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What are the 3 characteristics of water quality |
Physical, biological and chemical |
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Physical characteristics? |
Temperature,taste,colour,odours,turbidity (mud,clay and silt) and ph |
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Biological characteristics? |
Refers to living organisms found in water. These include Bacteria. Viruses. Algae. Insects. Worms. Plants and fish. Most important is bacteria and viruses which mostly enters from sewage |
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Chemical characteristics? |
Most common chemical compounds include:calcium and magnesium(hardness) iron(ferrous and ferric) and manganese. Sulphur. Sodium and gases(oxygen,co2,h2s,ch4) |
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Water pollutants? |
Organic pollutants: produced from biological activity I.e. decay of plant life, dead animals, human and animal waste. Inorganic polutants: minerals, salts, etc. Metals like mercury, lead, arsenic and calcium are examples of inorganic pollutants. |
