Convection and the Mantle

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Presentation transcript:

Convection and the Mantle Ch. 1.2

I. CONVECTION AND THE MANTLE A. INTRO a. Earth’s molten core is nearly as hot as the ___Surface_____ of the Sun. b. Heated objects have particles that move ____faster_____. c. The faster particles have more __energy____. Brain Pop: Heat

II. TYPES OF HEAT TRANSFER a. Heat ALWAYS moves from __Warmer____ substance to a ____Cooler____ substance. b. There are __3____ types of Heat transfer: __Radiation,__Conduction and Convection. _________________________________, and __________________________. Video on Heat Transfer http://www.youtube.com/watch?v=Atnjo7dD_bA

A. Radiation a. The transfer of _energy___ through __space____ is called ___radiation_____. b. Two types of radiation is: ___Sunlight_____ and a __flame____ or ____open___ ___fire____.

B. Conduction a. Heat transfer ___within___ a material or between materials that are ___touching__ is called ___Conduction______. b. One example is a ____spoon___ in a ___pot___ on a stove.

B. Convection a. Heat can be transferred by the movement of ___fluids____,- ___liquids___ and ___gases____. b. Convection is ___heat___ ___transfer___ by the movement of ____currents___ within a fluid. c. Heat transfer by Convection is due to changes in ____temperature___ and ___density__ in a fluid. d. Density is a measure of how much ___Mass____ there is in a given ___Volume____. Heat Transfer Rap http://www.youtube.com/watch?v=7Y3mfAGVn1c

III. CONVECTION CURRENTS A. Convection Currents a. A convection current is the _flow__ that transfers heat within a __fluid___. b. _Heating__ and _Cooling__ of the fluid , __changes___ in the fluid’s density and the __force___ of __Gravity__ combine to set ____Convection____ currents in motion.

B. Convection Currents in the Earth a. Heat from the _Core______ and the __Mantle____ itself causes convection currents in the _Mantle___.

What rocks are found in Earth’s Crust? Layers of the Earth Song http://www.youtube.com/watch?v=Q9j1xGaxYzY (2:45)

How is the Earth a Magnet? Scientists think that movement in the liquid outer core create Earth’s magnetic field. BrainPop: Earth’s Structure (2:48)