What causes convection currents to form in the oceans quizlet?

The sun causes uneven heating which leads to differences in air pressure. This causes wind, which moves the water at the surface of the ocean. Uneven heating causes density differences in the water which causes convection currents.

How are currents formed in the ocean?

Ocean currents can be caused by wind, density differences in water masses caused by temperature and salinity variations, gravity, and events such as earthquakes or storms. Currents are cohesive streams of seawater that circulate through the ocean.

What is convection in the ocean called?

They pull the dense water of the polar regions downward, which drives a worldwide convection engine called thermohaline circulation (thermo – driven by temperature differences; haline – driven by salinity differences).

How are convection currents ultimately formed?

When the molecules are heated, they move faster and move apart, causing them to be less dense and rise. When the warm air rises and the cool air sinks, convection currents are created.

How do convection currents form quizlet?

Convection currents occur when magma heats up near the core and rises. As it rises it cools down and spreads out, moving the plates. It cools down and spreads out, moving the plates. It then cools down and moves back towards the center of the earth where it heats up again!

What causes convection in the atmosphere quizlet?

Convection is heat transfer by the movement of currents with in a fluid. It is caused by the difference in temperature and density. Heating and cooling of the fluid, changes in the fluid density, and the force of gravity, combine to set convection currents in motion.

How are ocean currents formed Class 7?

Ocean currents are streams of water flowing constantly on the ocean’s surface in definite directions. They are caused by differences in the temperature and salinity of water, by wind, solar heating and gravity. The winds majorly responsible for creating ocean currents are the Westerlies and the Trade winds.

What produces surface currents in the ocean quizlet?

Surface currents occur at the surface of the ocean and are caused by global winds; the Gulf Stream is an example. Deep currents occur deep in the ocean and are influenced by water density, salinity, and temperature.

How are the convection currents set in motion quizlet?

Convection currents are set in motion by the transfer of energy between Earth’s hot interior and cooler exterior. Regions of hot mantle are less dense than areas of cooler mantle and are slowly forced toward the crust. Cooler parts of the mantle sink back toward the core.

What are the causes and effects of ocean currents?

Wind, temperature differences, water density and salinity all play a role in generating ocean currents. Currents may also be influenced by external forces, such as earthquakes, the coriolis effect produced by the Earth’s rotation, and the gravitational pull of the Moon.

What do convection currents cause?

Convection currents play a role in the circulation of fluids. Convection currents are the result of differential heating. Inside Earth, the convection of mantle material is thought to cause the movement of the overriding crustal plates, resulting in events such as earthquakes and volcanic eruptions.

How do convection currents cause plate movement?

How Convection Currents Affect Plate Movement. ConvectionCurrents affect the way tectonic plates move. It happens when semi melted rock. in the mantle heats up and rises up to the crust and spreads apart moving the plates above it.

What are some examples of convection current?

A simple example of convection currents is warm air rising toward the ceiling or attic of a house. Warm air is less dense than cool air, so it rises. Wind is an example of a convection current. Sunlight or reflected light radiates heat, setting up a temperature difference that causes the air to move.