Unit 4 Test Review - Hydrosphere

Point source and non-point source pollution differ in

• the number of sources from which the pollution is discharged

• the kind of biological agents causing pollution

• whether the source of pollution is agricultural or industrial

• whether the pollutants are chemical or physical agents

Which of the following is an example of nonpoint source of fresh water pollution

• runoff from a roadway

• a leaking landfill

• sewage treatment plant

• factory waste piped into a stream

When a neighborhood noticed a number of dead frogs in a local creek, they traced the problem to a leaking oil tank. This is

• point source pollution

• non point source pollution

• thermal pollution

• groundwater pollution

The entire area of land that drains into a specific river

• watershed
• water table
• impaired waters
• water pollution

Which of these is one way a person could conserve water?

• use dual flush toilets
• take long baths instead of showers
• wash small loads of laundry
• water your lawn at lunch

The largest watershed in the US is

• Mississippi River
• Colorado River
• Yukon River
• Rio Grande

What might occur as a result of plastic trash in the ocean?

• all of these
• animals mistake it for food and ingest it
• seals become tangled in fishing lines
• birds are strangled by plastic 6 pack rings

Why do you add chlorine to water in the water treatment process?

• to kill or limit bacterial growth
• to remove unwanted gases
• to form flocs
• to remove large debris

Which of the following causes the most ocean pollution?

• pollutants carried into the ocean by rivers
• ships dumping garbage into the ocean
• sewage sludge dumped directly into the ocean
• oil spills from tankers

Which letter represents the water table on the diagram?

• C

• B

• A

• D