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Convection Currents and the Mantle - Typepad Share your 对流和地幔TypePad分享你.ppt

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Convection Currents and the Mantle - Typepad Share your 对流和地幔TypePad分享你.ppt

Popcorn needs heat to pop--between 400 to 450 degrees Fahrenheit. Inside the kernel is starch and moisture. When heated, the moisture turns to steam, which builds pressure inside the kernel. The pressure increases until the kernel ruptures, turning the kernel inside out. Yum! MYP Unit Question: How does land change? Area of Interaction: Environment Learner Profile: Thinker Standard: Investigate the scientific process of how the Earths surface is made. Learning Target: Today I’m learning about heat transfer because it will help m e to understand how things on earth heat up. 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. Trivia – Do NOT copy this information. Heat Transfer – is the movement of energy from a warmer object to a cooler object. What is heat transfer? There are three types of heat transfer: Convection Radiation Conduction What are the types of heat transfer? Example: Sunlight is radiation that warms the Earth’s surface Heat you feel from around an open flame or fire Radiation Radiation: is the transfer of energy through empty space. What is radiation? Conduction: is heat transfer by direct contact of particles of matter. What is 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: is heat transfer by the movement of a heated fluid. What is convection? Convection Current cooler fluid continually sinks to the bottom warmer fluid continually rises to the top. What is a convection current? 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 causes convection? What is density? Convection Current Demo Simon Says “Convection Currents” HOMEWORK: Finish the Heat Transfer Worksheet The heating and cooli