TRANSFORMATION OF ENERGY

What type of energy transformation occurs, when a hawk eats a mouse and then uses the energy from the mouse to fly?

• mechanical energy to chemical energy

• thermal energy to mechanical energy

• chemical energy to mechanical energy

• mechanical energy to thermal energy

Which object shows an energy transformation from electrical to mechanical?

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What is the energy transformation that occurs in an electric pencil sharpener?

• mechanical energy to electrical energy

• electrical energy to mechanical energy

• radiant energy to sound energy

• chemical energy to mechanical energy

What type of energy transformation occurs in an electric fan?

• electrical energy to mechanical energy

• radiant energy to mechanical energy

• chemical energy to radiant energy

• electrical energy to nuclear energy

What type of energy transformation occurs in an electric hot that is turned on?

• thermal energy to electrical energy

• electrical energy to thermal energy

• thermal energy to mechanical energy

• mechanical energy to thermal energy

When a car burns gasoline it creates hot air to move the pistons in the engine, which causes the car to move. What energy transformation occur from the fuel to the movement of a car?

• thermal energy to mechanical energy

• thermal energy to chemical energy to mechanical energy

• chemical energy to thermal energy to mechanical energy

• chemical energy to electrical energy

Which of the following is a disadvantage of using solar energy?

• releases carbon dioxide into the atmosphere

• reduces the need for electricity from fossil fuels

• produces energy only when the sun is shining

• is an unclean source of energy

Which of the following is a true statement about using different energy resources?

• Wind power is an expensive, non renewable source of energy for the production of electrical energy

• Solar power is a clean, renewable source of energy used in the production of electricity

• Coal is a safe effective renewable source of energy used in the production of electricity

• Nuclear power is a cost effective, nonrenewable energy resource that leaves behind no waste

What energy transformations take place when a battery-operated radio is in use?

• Electrical to chemical to light
• Sound to chemical to mechanical
• Chemical to electrical to sound
• Light to electrical to thermal

Which of the following devices transforms electrical energy into mechanical energy?

• An e-reader
• a fan
• a manual pencil sharpener
• ipod