Marine Bio/Oceanography

Oceans are ecosystems with great biodiversity.

• Yes

• No

Phytoplankton in the ocean produce more than half of the _____ in the atmosphere.

• Carbon

• Helium

• Oxygen

• Nitrogen

Marine life

• Is less well adapted to its habitats than terrestrial life

• Is not as abundant or diverse as terrestrial life

• Supplies us with food and oxygen

• All of these

How are oceans important to climate?

• They moderate climate within a region

• They lessen the temperature range of nearby lands

• They distribute heat around the planet

• All of the above

The oceans are huge and there are many habitats, but there is not much biodiversity or biomass within them.

• True

• False

Salinity means _____

• Dissolved salt content in a body of water

• Density of a body of water

• Organisms present per unit area of a body of water

• None of the above

In regions of the ocean where evaporation is greater, what happens to the density of the water?

• Density is highe

• Density is lower

• No effect on density

• None of the above

Water density increases with the

• Decrease in temperature

• Increase in pressure

• Increase in water salinity

• All of the above

Thermohaline circulation is the result of density differences in water masses because of their different _____

• Temperature.

• Salinity

• Gravity

• Both A and B

The replacement of nutrient-depleted water by nutrient-rich water is called _____

• Downwelling

  .

• Upwelling

• Circulating

• None of the above