Intro to Heat And Energy Transfer. Heat Heat is kinetic energy in a substance. Heat is the motion of the molecules in a substance, not the motion of the.

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Presentation transcript:

Intro to Heat And Energy Transfer

Heat Heat is kinetic energy in a substance. Heat is the motion of the molecules in a substance, not the motion of the substance. Energy that flows between two objects because of a difference in temperature. For example, a metal spoon in hot water.

Measuring Heat Celsius Freezing : 0 degrees Boiling : 100 degrees Fahrenheit Freezing : 32 degrees Boiling : 212 degrees

Heat Movement Molecules move from places of higher temperatures to places with lower temperatures

Thermal Equilibrium Molecules move from warm to cold until they reach a balanced temperature This balance is called thermal equilibrium.

Insulators & Conductors 6 th Grade Science

Vocabulary Insulator an object that reduces the transfer of heat Conductor an object that easily allows the transfer of energy

Expansion & Contraction

Vocabulary Expansion as molecules in a solid, liquid or gas are heated they spread out as they move around quickly and cause objects to become larger (expand) Heating = Bigger Contraction as molecules in a solid, liquid or gas are cooled they move closer together and cause objects to shrink (contract) Cooling = Smaller

Vocabulary Solid particles vibrate in one place Liquid particles spin and move closely togetherGas particles spin and move fast and far away from each other

Heat Transfer

Vocabulary Conduction  the transfer of heat by direct contact between solids Convection Transfer of heat in liquids & gases Transfer of heat in liquids & gases Heat rises Heat risesRadiation Transfer of heat in empty space w/o any particles Transfer of heat in empty space w/o any particles

Examples Conduction A pot heating on a stove A metal spoon in boiling water Convection Boiling water Boiling water Heating a home Heating a homeRadiation Sun’s rays heating a car Sun’s rays heating a car Sun’s rays heating Earth Sun’s rays heating Earth Heat from Heat from a fire