MONDAY NOVEMBER How WARMUP do unpopped popcorn kernels

MONDAY, NOVEMBER How WARM-UP do unpopped popcorn kernels change to popped kernels?

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 Earth's 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.

TYPES OF HEAT TRANSFER

HEAT TRANSFER Earth’s Trivia – Do NOT copy this information. 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 What is heat transfer? Heat Transfer – is the movement of energy from a warmer object to a cooler object.

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

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

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

CONDUCTION What is conductio n? 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.

CONVECTION CURRENT What is a convection current? Convection Current cooler fluid continually sinks to the bottom warmer fluid continually rises to the top.

CONVECTION

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

CLOSING: Convection Current Demo Simon Says “Convection Currents” HOMEWORK: Finish the Heat Transfer Worksheet

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 Where does the heat source for the Earth’s currents come 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.

CONVECTION AND THE EARTH’S MANTLE

CONVECTION AND THE EARTH’S MANTLE

STUFF TO DO: 1. 2. 3. Complete the Heat Transfer concept map on the back of your note page. If you didn’t begin or finish the Earth’s interior worksheet from yesterday pick it up from the red box and complete it. Once you have finished Earth’s interior, pick up a What’s happening during convection? Worksheet. DO NOT WRITE ON THESE WORKSHEETS!!!! ALL YOUR WORK MUST BE DONE IN YOUR SCIENCE NOTEBOOK!

8 TH GRADE EXIT SLIP 09/14/10 Answer the following question: What are three types of heat transfer?