Energy Heat and Solar Energy
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Transcript of Energy Heat and Solar Energy
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Energy Heat and Solar Energy
Mandek Richardson University of South Florida
STARS Program
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Vocabulary• Heat• System• Conduction • Convection • Radiation • Reflection • Solar Energy • Light
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Light/Solar Electrical Chemical cal
Thermal NuclearHeat Nuclear
Sound
Mechanical
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Solar Energy
• Solar energy is energy that comes from the sun
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Energy from the sun travels as radiation
The sun produces several types of radiationLight we seeHeat we feel
X-raysRadio waves
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Where is Solar Energy Used?
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Sunlight and Electricity
Red circles are electrons
Photovoltaic Cells or Solar Cells
or
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Solar CarSolar cars have solar panels on their roofs to
collect light so that is converted to electricity to run an electric motor
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How are heat and temperature related?
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Heat and Temperature• Heat is a type of energy
• All things are made of atoms and atoms are always moving
• Heat is the total kinetic energy of all the atoms in an object
• Even cold things like an ice cube have heat energy just not a lot
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Heat and Temperature
Objects with slower moving
atoms have Low heat energy.
Objects with faster moving atoms have High heat
energy.
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Temperature
• Temperature is a measurement of the average kinetic energy of the atoms in an object
• Temperature is not energy but a measure of it
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Heat Transfer • There are 3 ways in which heat can move
through a system
1. Conduction 2. Convection 3. Radiation
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Conduction
Conduction occurs in solids only!
Conduction is the transfer of heat energy from atom to atom by contact only
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Convection
Convection occurs in liquids and gases
Convection is the transfer of heat energy by the movement of atoms themselves
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Radiation Radiation is heat transfer with NO ATOMS!
Radiation is the transfer of heat energy through waves
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Radiation
Heat radiation can travel through space
It is what keeps the earth warm
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What color absorbs more heat?