A thermal column (or thermal) is a vertical section of rising air in the lower altitudes of ...Solar radiation affects the oceans: warm water from the Equator tends to ... currents carrying heat from the interior of the earth to the surface. ... case the fluid motion is called gravitational convection
currents caused by temperature differences in the water
Heat changes the density of a fluid - relatively hot fluids rise and cold fluids sink causing a current
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warm-water
Warm water expands and rises, cool water contracts and sinks.
warm
A thermal is warm air rising off the ground that has been heated by the sun.
cause of convection
Hang gliders rely on currents of warm air called thermals - to lift them high into the atmosphere. Knowing the type of weather in the area they want to fly - enables them to plan a route to make the most of the available updrafts.
The circulation of cold and warm water between the poles and the equator, and the rotation of the earth, cause ocean currents to flow.
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warm-water
convetion currents
Warm currents have a very obvious affect on the temperature that surrounds it. Warm currents will warm the area around the currents.
Warm currents have a very obvious affect on the temperature that surrounds it. Warm currents will warm the area around the currents.
Warm currents have a very obvious affect on the temperature that surrounds it. Warm currents will warm the area around the currents.
Ocean currents can carry warm water. As they are traveling, the warm water they are carrying warms up the air near them. The warmed air may then also warm the land around it, making the temperature of the land near the ocean currents milder.
Warm air rising and cold air sinking in combination with the rotation of the Earth cause the various currents in the atmosphere.