Energy and It's Applications Concept Review Game

Efficiency

• The comparison of the amount of energy or product produced to the amount of energy or product put in

• The ability of a system to do work or produce heat

• Energy is neither created nor destroyed in an ordinary chemical or physical process; it is also known as the first law of thermodynamics.

• Changing from one form of energy to another

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No engine can ever be 100% or more efficient. Why is this?

• The law of diminishing energy states that engines lose energy.

• Energy is destroyed in the processes of converting to the desired energy.

• Some engines are more than 100% efficient.

• Some of the initial energy is always changed to a less useful form when producing the desired energy.

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Not all of the energy stored chemically in gasoline is converted to mechanical energy by a car's engine. Which of the following best explains why?

• Chemical bonds are not able to release all their stored energy.

• More energy is required to make something move than to hold elements together.

• The energy stored in gasoline is millions of years old, so it degrades over time.

• Some of the energy is converted to the noise and heat produced by the engine.

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Conservation of Energy

• The ability of a system to do work or produce heat

• Energy is neither created nor destroyed in an ordinary chemical or physical process; it is also known as the first law of thermodynamics.

• The comparison of the amount of energy or product produced to the amount of energy or product put in

• Changing from one form of energy to another

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Energy Conversion

• Energy is neither created nor destroyed in an ordinary chemical or physical process; it is also known as the first law of thermodynamics.

• The ability of a system to do work or produce heat

• Changing from one form of energy to another

• The comparison of the amount of energy or product produced to the amount of energy or product put in

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Energy

• The ability of a system to do work or produce heat

• Changing from one form of energy to another

• The comparison of the amount of energy or product produced to the amount of energy or product put in

• Energy is neither created nor destroyed in an ordinary chemical or physical process; it is also known as the first law of thermodynamics.

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Given the information in the illustration and understanding that the gravitational potential energy of an object on Earth can be calculated using the formula PE = m x g x h, in which m = mass in kilograms, g = the acceleration due to gravity, and h = height in meters, what was the change in gravitational potential energy of the spring after the mass was placed on it?

• A decrease of 49 joules

• An increase of 49 joules

• A decrease of 245 joules

• An increase of 245 joules

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Which object would have the highest temperature?

• Particles that move faster and collide more often.

• Particles that move slower and collide less often.

• Particles that do not move at all

• The movement of the particles does not impact the temperature of an object

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Solar cells (solar panels) can change solar/light energy into _______ energy?

• sound

• gravitational

• electrical

• electromagnetic

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Which of the following most accurately describes the current understanding of energy and mass in reactions?

• As the energy of a system increases, so does the molecular motion of all parts of the system.

• Energy can only be exchanged between systems that are in direct physical contact with each other.

• Energy and mass can never be created or destroyed; they can only be transferred between systems.

• The greater the mass of all the components of any system is, the greater the amount of energy it can generate.

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