Hydrosphere and Humans 3

What are the four main factors responsible for creating ocean currents?

• Wind, pressure, temperature, salinity

• Cloud cover, air pollution, ozone layer, greenhouse gases

• Tides, moon phases, earthquakes, volcanic eruptions

• Rainfall, humidity, sunlight, air pressure

At what depth do surface currents occur in the ocean?

• 200m deep

• 100m deep

• 300m deep

• 400m deep

What causes the creation of wind?

• Differences in humidity

• Differences in ozone layer

• Differences in cloud cover

• Differences in air pressure

What is the process called when warm air rises and cooler air rushes in to take its place over the ocean?

• Land breeze

• Coriolis effect

• Sea breeze

• Convection heating

What are the three factors that mainly affect deep ocean currents?

• Density, pressure, temperature

• Wind, temperature, salinity

• Temperature, salinity, density

• Pressure, wind, salinity

In which regions does freshwater tend to freeze as icecaps and icebergs?

• Temperate regions

• Polar regions

• Tropical regions

• Equatorial regions

What effect does the Coriolis effect have on ocean currents?

• It causes currents to move vertically

• It has no effect on ocean currents

• It causes currents to move in a circular path

• It causes currents to move in a straight line

What do deep ocean currents move besides sediments?

• Rocks

• Marine animals

• Thermal energy

• Plants

What causes currents to change direction due to the revolution of Earth around the Sun?

• Tides

• Moon phases

• Seasons

• Volcanic eruptions

What aspect helps to insulate the temperature in coastal areas resulting in moderate climate ranges?

• Wind patterns

• Ocean currents

• Rainfall

• Tectonic plate movement