Oceans Review

What is the defining difference between the marine, freshwater, and estuary biomes?

• Salinity (dissolved salt)

• Sunlight

• Oxygen

• Amount of Water

Why does the water level in an estuary rise and fall?

• ocean tides bring water in and out of the shore, causing flooding in the estuary

• rivers add new water off and on through the day

• people all flush their toilets at the same time and it fills the estuary

• lots of rain makes the flooding

Why does it matter how much salt is in the water for organisms?

• the wrong amount of salt causes organisms to become ill or die

• they don't like the way it tastes

• salt makes it easier to swim

When salt and fresh water mix, what is the new water substance called?

• Brackish Acid
• Fresh Water
• Salt Water
• Brackish Water

What is the largest estuary in North Carolina?

• Palmico Sound

• Albermarle Sound

• Cape Fear Estuary

• Chesapeake Bay

If the planktons are removed from the estuary, what may

happen to the estuarine food web?

• Planktons are producers so their removal may not have an effect.

• The other animals in the estuary will have to find other food sources.

• Removal of any organism like the plankton will greatly

  affect the ecosystem.

• Filter feeders like oysters and clams don’t depend on the presence of plankton.

Upwelling is the process where warm, nutrient rich water from deep in the ocean rises to the surface.

• False
• True

Upwelling occurs in the waters off the ____________ coast of continents in the tropics.

• West 
• North
• East
• South

A result of upwelling is a/an _________ in nutrients in the water.

• Decrease
• Increase
• No Change

______ cause surface currents.

• The Coriolis Effect

• gravity

• density differences

• Surface wind patterns