Sol 4.7 Ocean

People depend on ocean organisms for __________________.

• minerals
• fuels
• food and water
• All of these choices

Minerals and nutrients from deep in the ocean are brought to the surface in cold water as a result of __________________.

• thermal pollution
• upwelling
• marine turbulence
• human activity

Fisheries renew themselves naturally each year, but __________________ has caused a shortage of fish in some areas.

• overfishing
• catch limits
• global warming
• aquaculture

Fuels such as ________________ are created naturally over the course of hundreds of millions of years from the remains of dead marine organisms.

• coal
• nuclear material
• oil and natural gas
• wood

_________________, the farming of salt and freshwater organisms, is increasingly common.

• Aquaculture
• Fisheries
• Surf fishing

Although some ocean pollution is the result of natural occurrences, most pollution is related to _______________.

• global warming
• human activities
• ozone depletion
• upwelling

Metals on the ocean floor can concentrate around pieces of shell, forming black lumps called _____________.

• coal
• nodules
• tar balls
• pollution

Fresh water can be produced by removing the salt from ocean water using a process called ______________.

• salt water cleanup
• desalination
• water purification
• wastewater treatment

___________________ from damaged tankers or drilling platforms can cause wide destruction to living things in the ocean.

• Propellors
• Sewage dumping
• Scrap metal
• Oil pollution

The best way to keep the ocean clean is to ______________________. 

• skim trash regularly
• stop using the ocean as a resource
• establish regulations for safety and environmental regulations
• start a war to take over the ocean as our own resource