Hydrosphere

Water pollution that comes from many sources is considered...

• point source pollution

• nonpoint source pollution

• thermal pollution

• ocean pollution

High turbidity indicates poor water quality because

• it clogs the gills of aquatic animals and makes it difficult to breathe
• it makes it hard for sun to get to the aquatic plants
• it makes it hard for aquatic animals to find their food
• all are reasons high turbidity indicates poor water quality

When there is a single identifiable and localized source of water pollution, such as wastewater discharge into a stream.

• runoff
• drainage
• point source pollution
• non-point source pollution

The local middle school has a fish pond in the courtyard. The pond water is suffering from eutrophication. Which most likely caused this problem?

• poor filtration
• direct sunlight
• fertilizer runoff
• improper cleaning

Many areas such as an entire farming region, a suburban community with many lawns and septic systems or storm runoff from parking lots.

• Point source

• nonpoint source

• wastewater

• water pollution

Point source pollution is more easily controlled. Why?

• They come from a variety of sources.

• They come from a single, identified source.

• Lots of people contribute to it.

Which is a bioindicator?

• current
• rock 
• insect
• water

A distinct location from which pollution is directly produced.

• Point source
• nonpoint source
• wastewater
• water pollution

Which government agency regulates drinking water quality?

• FDA

• EPA

• CDC

• FBI

What organisms are usually used as bioindicators to assess stream health because they are sensitive to pollution and easy to catch?

• microorganisms
• bioilluminators
• hydrogen bonds
• macroinvertebrates