Unit 6: Water Use & Pollution Review

1.     Water that is healthy enough to be able to drink is known as being what?

• safe

• potable

• fresh

• healthy

The cloudiness of water that is due to the amount of sediment dissolved in the water is known as what?

• sedimentation

• potability

• turbidity

• clearness

On the pH scale a range from 0-6 would be considered what?

• acidic

• neutral

• basic

• alkaline

Which of the following is NOT a source of nitrates in the water supply?

• runoff from fertilizers

• sewage

• erosion

• cleaning and laundry waste

The measure of the amount of salt in water is known as what?

• salinity

• turbidity

• potability

• acidity

This is caused when excessive plant nutrients enter a body of water and causes an overgrowth of algal blooms. 

• bioaccumulation

• biomagnification

• artificial eutrophication

• bioassay

Which water will hold the most dissolved oxygen?

• cool water

• warm water

• acidic water

• turbid water

The pH of aquatic ecosystems is an important factor for biodiversity.  On a pH scale, what is considered basic?

• above 7

• 7

• below 7

This type of pollution can be traced back to a specific point.

• point source pollution

• non-point source pollution

Which of the following would be the best example of a non-point source of pollution?

• a factory smokestack

• sediment from a construction site

• cyanide from a gold mine

• oil and gasoline from a city