Marine Science Unit 2 Exam Review

The temperature of the deep sea is consistently around:

• 1°C

• 2°C

• 10°C

The thermocline is a layer in the ocean where:

• there is a rapid change in temperature

• there is a rapid change in salinity

• there is a rapid change in density

What causes ice to float on water?

• When water freezes, it expands and its density decreases.

• When water freezes, it absorbs more hydrogen from the air, increasing its buoyancy.

• When water freezes, air is trapped between the hydrogen bonds of water molecules.

• When water freezes, it absorbs more oxygen from the air, increasing its buoyancy.

The global ocean circulation system is known as thermohaline circulation because it is influenced by

• atmospheric pressure

• Earth's rotation

• variations in temperature and salinity

• La Nina

In an El Nino event, the tradewinds:

• become weaker

• become stronger

• remain unchanged

Downwelling transports surface water to the depths that is abundant in:

• marine life

• minerals

• oxygen

Which statement is accurate?

• Ocean currents moving from the equator transport significant heat energy to the poles.

• Ocean currents moving from the equator transport significant nutrients to the poles.

• Ocean currents moving from the equator transport significant oxygen to the poles.

Strong upwellings occur along coastlines with strong winds (such as Peru), but where else in the ocean can upwellings occur?

• Seamounts

• Deep sea trenches

• Earthquakes

• High salinities

Coriolis Effect affects surface currents by

• making them warmer
• deflecting them left or right
• forcing them downwards
• making them faster

Which of the following does NOT significantly influence ocean currents?

• Coriolis Effect

• Winds

• Temperature and Density

• Gravitational pull of the Moon