Understanding the Hydrosphere and Ocean Currents

What is the primary component of the hydrosphere?

• Air

• Water

• Soil

• Rocks

What percentage of Earth's water is found in the oceans?

• 50%

• 70%

• 97%

• 100%

The Global Ocean is best described as:

• A series of disconnected bodies of water.

• A single, interconnected body of saltwater.

• The area around the Arctic Ocean only.

• A freshwater system on land.

How does the hydrosphere interact with the biosphere?

• By providing sunlight for photosynthesis.

• By supplying water to living organisms.

• By producing oxygen for animals.

• By generating energy for ecosystems.

Which factor is most influenced by the Global Ocean?

• Earth's gravity.

• Earth's rotation.

• Earth's climate.

• Earth's core temperature.

Surface currents are primarily driven by:

• Earth’s gravity.

• Wind.

• The Moon’s phases.

• Volcanic activity.

Deep currents are caused by differences in:

• Temperature and salinity.

• Wind speed.

• Ocean tides.

• Plate tectonics.

What is the main role of ocean currents in Earth's climate system?

• Generating oxygen for the atmosphere.

• Transporting heat across the planet.

• Creating new ecosystems underwater.

• Preventing tsunamis from occurring.

Which current is known for cooling the west coast of North America?

• Gulf Stream

• California Current

• Arctic Current

• Equatorial Current

Why does cold, deep water flow along the ocean floor?

• It is pushed by surface winds.

• It is denser than warmer water.

• It contains more oxygen.

• It is affected by ocean tides.