Convection Currents and the Mantle Heat Transfer Convection Currents and the Mantle

Heat Transfer Earth’s molten outer core is nearly as hot as the surface of the sun. Heat is transferred from the core to the surface of the Earth through liquids and solids.

Heat Transfer Heat Transfer – is the movement of energy from a warmer object to a cooler object. What heat transfer?

There are three types of heat transfer: What are the types of heat transfer? There are three types of heat transfer: Radiation Conduction Convection

Radiation: is the transfer of energy through empty space. What is radiation? Radiation: is the transfer of energy through empty space.

Radiation Example: Sunlight is radiation that warms the Earth’s surface Heat you feel from around an open flame or fire Radiation

Conduction: is heat transfer by direct contact of particles of matter. What is conduction? Conduction: is heat transfer by direct contact of particles of matter.

Conduction Example: Heat is transferred from the hot soup and the pot to the particles that make up the spoon. Heat transferred to the particles of the spoon from the pot and hot water

Convection What is convection? Convection: is heat transfer by the movement of a heated fluid During convection heated particles of fluid begin to flow. Transferring heat energy from one part of the fluid to another.

What causes convection? Heat transfer by convection is caused by differences of temperature and density within a fluid. Density - Is a measure of how much mass there is in a volume of a substance. What is density?

Convection Current A constant flow begins as the cooler fluid continually sinks to the bottom of the pot and the warmer fluid rises. Convection Current – is the flow that transfers heat within a fluid What is a convection current?

Convection

Convection Current What sets convection currents in motion? The heating and cooling of the fluid, changes in the fluid’s density and the force of gravity combine to set convection currents in motion.

Convection and the Earth’s Mantle Earth’s mantle responds to heat. Convection currents flow in the Asthenosphere. The heat source for these currents come from the Earth’s core and from the mantle itself. Where does the heat source for the Earth’s currents come from?

Convection and the Earth’s Mantle

Convection and the Earth’s Mantle