Energy Conservation

Where in the swing does the girl have the greatest potential energy?

• Highest point of the swing.

• Mid point of the swing

• Lowest point of the swing.

• When the chain breaks

Energy can not be created or destroyed, energy only changes form is known as the Law of _____.

• Conservation of Momentum

• Conservation of Matter

• Conservation of Energy

• Conservation of Electricity

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What happens to the energy of the toy?

• The potential energy of the toy is greatest while the toy is falling.

• The kinetic energy of the toy is greatest when the toy is finished falling.

• Some kinetic energy of the toy changes to potential energy as the toy falls down the steps.

• Some of the potential energy of the toy changes to kinetic energy as the toy falls down the steps.

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According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?

• The total amount of energy is conserved

• The total amount of energy is less after a reaction

• The total amount of energy is more after a reaction

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When you pull back a toy car, a spring is wound tightly. When you let go, the spring unwinds, and the car races forward. Which statement best describes the energy of the toy car?

• The car has chemical potential energy when it is pulled back and kinetic energy when it races forward.

• The car has kinetic energy when it is pulled back and chemical potential energy when it races forward.

• The car has elastic potential energy when it is pulled back and kinetic energy when it races forward.

• The car has kinetic energy when it is pulled back and elastic potential energy when it races forward.

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When something is dropped, what type of energy transfer takes place?

• Kinetic -> Gravitational Potential

• Gravitational Potential -> Kinetic -> Sound

• Electrical -> Chemical

• Heat -> Nuclear

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Which is not an example of conservation of energy?

• Turning lights off when not in use

• Leaving the refrigerator door open.

• Riding a bike to school.

Which is most likely to conserve energy resources?

• using public transportation

• using nuclear energy instead of solar energy

• turning thermostats up higher in winter

• burning coal instead of using hydropower

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Which is an example of conservation?

• Carpooling

• Leaving all the TVs in the house on, but only watching one.

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Which of the following best describes the Law of Conservation of Energy?

• Energy can be created and destroyed.

• Energy can be transformed from one form to another, but the total amount remains constant.

• Energy is always lost as heat.

• Energy is only conserved in closed systems.

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