B1 LS4 Elaborate Testing Pollution in Tap & Bottled Water

Water composes how much of the weight of living organisms?

• 50 to 60%

• 60 to 70%

• 70 to 80%

• 80 to90%

Pollution leads to a strain on water's ability to recycle and cleanse itself of contaminants.

• True

• False

How much of the United States population depends on undergroundaquifers as a source of drinking water?

• 25%

• Roughly half

• 75%

• 95%

Aquifers are threatened by (select all that apply)

• over use and depletion

• longevity of stable pollutant contaiminants

• evaporation of resources

An example of point specific pollution would be

• runoff of city water that flows into the ocean

• discharge from a factory pipeline into a river that leads to a reservoir

• poor forestry techniques impacting groundwater

Chlorine is often found in public water supplies because

• it is added to enhance flavor

• it is added to kill bacteria

• it is added to fight cavities

• it is a naturally occuring substance

Water hardness refers to

• the amount of iron in the water

• the pH of the water

• measure of calcium and magnesium in the water

• the amount of solid particles present

If a water sample tests positive for copper, it means (select ALL that apply)

• it is naturally occuring due to mineral deposits in sounding rock layers

• the water has been exposed to sewage or industrial waste

• it has been added to kill bacteria

• it has been added to control the amount of aquatic vegetation

Awater sample with a high pH above 7 would be (select ALL that apply)

• considered basic or alkaline

• considered acidic

• due to rapidly growing algae and vegetation

• due to contamination from chlorine

Iron can be present in a water sample because

• there is a natural source such as rocks or soil

• it was exposed to industrial waste

• iron was released into the water by corrosion of iron pipes

• all of the answers stated