Law of Conservation of Energy with Balancing Equation

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 energy remains constant.

• Energy is always lost as heat.

• Energy can only be stored in chemical bonds.

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NGSS.HS-PS3-2

NGSS.HS-PS3-3

In a closed system, if the potential energy decreases, what happens to the kinetic energy according to the Law of Conservation of Energy?

• It increases.

• It decreases.

• It remains the same.

• It is destroyed.

Which of the following equations represents the Law of Conservation of Energy in a chemical reaction?

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NGSS.HS-PS1-7

NGSS.HS-PS3-4

A ball is dropped from a height. Which form of energy conversion takes place as it falls?

• Potential energy to kinetic energy

• Kinetic energy to potential energy

• Thermal energy to potential energy

• Chemical energy to kinetic energy

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

In an isolated system, the total energy is 100 J. If 30 J of energy is converted to heat, what is the remaining energy in the system?

• 70 J

• 100 J

• 30 J

• 0 J

Tags

NGSS.HS-PS3-1

Which of the following is an example of energy transformation that follows the Law of Conservation of Energy?

• A battery powering a flashlight

• A car engine creating energy

• A plant growing without sunlight

• A perpetual motion machine

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NGSS.HS-PS3-2

NGSS.HS-PS3-3

What is the primary principle behind balancing chemical equations?

• Conservation of mass

• Conservation of energy

• Conservation of charge

• Conservation of volume

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NGSS.HS-PS1-7

In the reaction @@ ext{C} + ext{O}_2 ightarrow ext{CO}_2@@, what is conserved?

• Mass and energy

• Only mass

• Only energy

• Neither mass nor energy

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NGSS.HS-PS1-4

NGSS.HS-PS1-7

Which of the following statements is true about energy in a chemical reaction?

• Energy is always absorbed.

• Energy is always released.

• Energy is neither created nor destroyed.

• Energy is always converted to mass.

Tags

NGSS.HS-PS1-4

How does the Law of Conservation of Energy apply to a pendulum in motion?

• The total energy of the pendulum remains constant.

• The energy of the pendulum increases over time.

• The energy of the pendulum decreases over time.

• The pendulum creates energy as it swings.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5