Ch 11 Water Resources HW #3

An excess of nutrients in the water is called ______________

• groundwater pollution
• thermal pollution
• eutrophication
• biomagnification

Humans cause artificial eutrophication when they allow ___________ to get into waterways

• dirt

• oil

• fertilizers

• chemicals

_______  and _______ are two plant nutrients that cause algal blooms

• carbon and oxygen
• nitrogen and phosphorus
• potassium and calcium
• silver and gold

The increasing concentration of a toxin, like DDT, as it moves up through a food chain is called 

• thermal pollution
• eutrophication
• biomagnification
• groundwater pollution

Thermal pollution and eutrophication are bad for aquatic organisms, because they both cause ___________

• decrease in dissolved oxygen
• increase in temperature
• decrease in available sunlight
• increase in species diversity

Pollution that can be traced back to a single source is called

• point-source pollution
• nonpoint-source pollution

An example of point-source pollution would be 

• runoff from the city streets
• a construction site
• a farming community
• a gas station

__________________  pollution is harder to control, because it can't be traced back to a single source

• point-source
• nonpoint-source

Most ocean pollution comes from

• runoff from land activities

• oil tanker spills

• recreational boats

• direct dumping of garbage

Which was the first law written to protect the quality of our waterways?

• clean water act
• safe drinking water act
• oceans act
• stop being dirty act