4.2 Conservation of Energy

Energy is the ability to ___________.

• Do nothing
• Cause change
• Fall
• Exist

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Energy transformations occur when...

• energy is created through conduction
• energy changes from one form to another
• two forces slide together that are touching
• a chemical reaction takes place

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What do we call a change from one form of energy to another?

• Energy change

• Energy transformation

• Energy creation

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Wind turbines and windmills convert what energy to another?

• Kinetic to electric
• Gravitational potential to electric
• Mechanical to potential
• Thermal to sound

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NGSS.MS-PS3-5

Which energy transformation occurs in a toaster?

• chemical to electric
• electric to thermal
• kinetic to chemical
• thermal to potential

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A battery converts what type of energy to another?

• sound to kinetic
• light to heat
• mechanical to electrical
• chemical to electrical

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A hairdryer converts -- 

• electrical energy into chemical
• electrical energy into thermal
• chemical energy into mechanical
• thermal energy into mechanical

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Inside a power plant, coal is burned to produce hot gases.  What type of energy conversion takes place as hot gases cause turbines to move?

• Thermal energy to chemical energy
• Thermal energy to kinetic energy
• electrical energy to kinetic energy
• Kinetic energy to thermal energy

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NGSS.HS-PS3-3

Kinetic Energy of wind is transferred to _____ Energy in a windmill.

• Solar

• Mechanical

• Electrical

• Potential

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A cell phone battery dies.  It gets plugged into an electrical outlet to recharge. Which of the following energy transformations occur during the charging?

• mechanical to chemical
• electrical to solar
• chemical to light
• electrical to chemical

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