what is energy? energy is the ability to cause change
TRANSCRIPT
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A Change is Going to Come
Energy at Work
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What is Energy?
• Energy is the ability to cause change
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Objects can gain energy.A pot boiling is gaining heat energy.
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Objects can lose energy.A bowling ball loses mechanical energy when it hits the bowling
pins.
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Energy appears in many forms.
• heat/thermal• light• sound• mechanical
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Thermal Energy
• Moves molecules• Is felt as heat
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Light Energy• The primary source of light energy is the sun• Light energy produces heat
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Sound Energy
• All sound begins when something vibrates
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Mechanical Energy
• The energy of motion
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You Decide
• Which tasks have energy?• If so, what kind of energy?
ThermalLight
Sound Mechanical