Energy Concepts and Conservation Quiz

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Questions and Answers

What happens to the potential energy of a billiard ball when it is dropped?

  • It is transformed into kinetic energy as it falls. (correct)
  • It is converted entirely into thermal energy.
  • It is destroyed and does not change form.
  • It remains potential energy until the ball hits the table.

In an energy exchange, what occurs when the system loses energy?

  • The surroundings lose an equivalent amount of energy.
  • The system immediately creates more energy.
  • Energy is destroyed to maintain balance.
  • The surroundings gain the same exact amount of energy. (correct)

Which statement accurately defines 'the system' in an energy context?

  • The specific object or collection of objects being analyzed. (correct)
  • Only the reactants of a chemical process.
  • The entire environment surrounding a chemical reaction.
  • Any energy that is lost during a reaction.

What form of energy is produced when iron reacts with oxygen in a hand warmer?

<p>Thermal energy that warms the surroundings. (A)</p> Signup and view all the answers

Which of the following concepts is incorrectly associated with the law of conservation of energy?

<p>Energy can be created from nothing under certain conditions. (A)</p> Signup and view all the answers

What is a consequence of energy transfer within a defined system?

<p>The total energy remains constant. (D)</p> Signup and view all the answers

Which statement best describes 'the surroundings' in energy exchanges?

<p>They encompass everything that can exchange energy with the system. (C)</p> Signup and view all the answers

How is energy described in the context of a chemical hand warmer?

<p>It transfers from the chemical to the surroundings. (B)</p> Signup and view all the answers

What happens to kinetic energy when a spring is released?

<p>It is converted from potential energy stored in the spring. (C)</p> Signup and view all the answers

When energy is exchanged between a system and its surroundings, what remains true?

<p>Energy lost by the system is equal to energy gained by the surroundings. (B)</p> Signup and view all the answers

Flashcards

Law of Conservation of Energy

Energy cannot be created or destroyed, only transferred and transformed.

Potential Energy

Stored energy due to position or configuration.

Kinetic Energy

Energy of motion.

System (in energy transfer)

The part of the universe being studied, specifically defined to track energy.

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Surroundings (in energy transfer)

Everything external to the system, where energy can transfer.

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Energy Transfer

Energy moving from one object or system to another

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System (in energy)

The object or collection of objects being studied for energy changes.

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Surroundings (energy)

Everything external to the system where energy can move

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Conservation of Energy

Energy cannot be created or destroyed, only changed from one form to another.

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Energy Exchange

The movement of energy from a system to its surroundings, or vice versa.

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