Ocean Currents and Their Influences on Movement and Density

The video explores factors influencing ocean water movement, including temperature, salinity, wind, Coriolis force, the Sun, and ocean floor topography. Temperature and salinity affect water density, creating currents. Wind generates surface currents, while the Coriolis force, due to Earth's rotation, causes gyres. The Sun's energy leads to thermal expansion, and ocean floor features like ridges and trenches influence water flow.

How does temperature affect the density of ocean water?

• Warm water is denser than cold water.

• Temperature has no effect on water density.

• Cold water is less dense than warm water.

• Cold water is denser than warm water.

Which ocean current carries warm water from the equatorial region to the North Atlantic Ocean?

• Labrador Current

• North Atlantic Current

• Gulf Stream

• Canary Current

What is the primary effect of salinity on ocean water?

• It makes water less dense.

• It has no effect on water movement.

• It increases water temperature.

• It affects water density and causes sinking.

What is the effect of cold, highly saline water on ocean currents?

• It evaporates quickly.

• It floats on the surface.

• It causes water to rise.

• It sinks and creates currents.

Which winds are responsible for moving ocean surface currents?

• Tropical winds

• Polar winds

• Westerlies and trade winds

• Monsoon winds

What is the Coriolis force's effect on ocean currents?

• It decreases water salinity.

• It stops ocean currents.

• It increases water temperature.

• It creates clockwise and anti-clockwise movements.

What is a gyre?

• A type of ocean floor feature

• A large system of circular ocean currents

• A type of wind pattern

• A measure of ocean salinity

How does the sun influence ocean water movement?

• By stopping ocean currents

• By cooling the ocean surface

• By causing thermal expansion

• By increasing salinity

What happens to ocean currents when they pass through a narrow opening?

• They slow down.

• They become very strong.

• They stop completely.

• They become weaker.

How does the topography of the ocean floor affect ocean currents?

• It has no effect.

• It causes currents to stop.

• It influences the direction and strength of currents.

• It only affects surface currents.