Ocean Motions and Environment

What is true about oceans?

• Ocean water has high salinity.

• Ocean water has many dissolved minerals.

• Ocean water has low density.

• Ocean water has dissolved gases.

Which has the greatest effect on tides?

• The Sun because it has a greater mass.

• The Sun because it is 93 million miles away.

• The moon because it is less than 250,000 miles away.

• The moon because it is smaller.

Surface currents moderate global temperatures by....

• moving warm water to the equator.

• moving warm water from the equator.

• moving cold water from the equator.

• moving cold water to the poles.

Tidal range is the difference between high and low tides during a day. When are tidal ranges the smallest.

• during neap tide

• during spring tide

• when the Earth, moon, and sun are aligned.

• when the Earth, moon, and sun are at right angles.

El Nino and La Nina effect global weather patterns. Which event increases dissolved oxygen and nutrients in the water?

• El Nino

• La Nino

Weathering affects oceans by

• increasing dissolved salts

• decreasing dissolved oxygen

• increasing dissolved minerals

• decreasing salinity

Deep density currents form from

• tides and waves

• wind and precipitation

• temperature and salinity

• minerals and oxygen

Select the correct order

• continental shelf, continental slope, abyssal plain, trench

• abyssal plain, trench, continental shelf, continental slope

• trench, continental shelf, abyssal plain, continental slope

• continental shelf, continental slope, trench, abyssal plain

What causes the Gulf Stream?

• Differences in density

• Tidal changes

• offshore waves

• wind

How do minerals enter the ocean water?

• wave action along shores

• underwater volcanic activity

• runoff, erosion, sedimentation

• evaporation