When mantle rocks near the earth’s core are heated, they become less dense than the cooler, upper mantle rocks. these warmer rocks rise, while the cooler rocks sink. this movement of warmer and cooler mantle rocks creates pockets of circulation within the mantle which are thought to be the force behind the movement of tectonic plates over the asthenosphere. what method of heat transfer is being described here?
C) convection cells (currents)
The movement of warmer cooler mantle rocks creating a circulation within the mantle is called a convection cell. These are the forces that drives the plate over asthenosphere.Convection is form of heat transfer predominant in liquids and gases. The mantle is molten and heated from heat within the core and the decay of radioactive bodies. Hot bodies are light and tend to be more buoyant. This causes warm mantle to rise to the surface. The cold part are denser and heavier, they sink in the mix. This creates pockets of circulation pattern within the mantle called convection cells.
C. Convection cells
Mantle convection is the moderate crawling movement of Earth's strong silicate mantle brought about by convection flows conveying heat from the inside to the planet's surface. Mantle convection, is a significant technique for heat transport inside the Earth. Mantle convection is the driving component for plate tectonics, which is the procedure eventually liable for delivering tremors, mountain ranges, and volcanoes on Earth. During the movement of warm and cooler mantle rocks, convention cells are created which acts as a pocket that creates force for the movement of tectonic plates.
This is similar to the convection currents of all fluids. The mantle is semi-plastic – meaning the rocks are hot enough to melt but remain ‘solid’due to the enormous pressure in the region. The currents are slow and though frictional drag they cause movement of tectonic plates of the crust above as they churn.
The movement of warmer and cooler mantle rocks creates pockets of circulation within the mantle called convection cells (currents). The force of the magma movement is thought to move the tectonic plates above.
So the answer is Convection Currents/cells
ratio of distance traveled to time interval
vector sum of forces on object
source of diverging light rays either luminous or illuminated
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an energy transformation flow diagram is shown
where is it ?