Conservation of Energy Mini Quiz

1. Which of these will happen when energy is conserved?

• The quantity of energy will increase.

• The quantity of energy will stay the same.

• A quantity of energy can be made.

• A quantity of energy can be destroyed.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

1. Which of these shows conservation of energy in an electric lamp?

• Energy input to the lamp equals energy output from the lamp.

• Energy input to the lamp is greater than energy output from the lamp.

• Energy input to the lamp is less than energy output from the lamp.

• The lamp should be switched off when not being used.

Tags

NGSS.MS-PS3-5

1. 100 J of electrical energy is supplied to a motor.

The electrical energy is changed to thermal and kinetic energy in the motor.

What is the total quantity of thermal and kinetic energy changed in the motor?

• 50 J

• 100 J

• 150 J

• 200 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

1. A car engine changes chemical energy to thermal and kinetic energy.

A total of 3500 J of thermal and kinetic energy are changed.

What is the quantity of chemical energy changed in the engine?

• 3500 J

• 1750 J

• 7000 J

• 0 J

Tags

NGSS.MS-PS3-5

1. An electric lamp takes in 1000 J of electrical energy.

The lamp wastes 850 J of energy. 

Determine the quantity of useful energy changed by the lamp.

• 1000 J

• 850 J

• 1850 J

• 150 J

1. A motorcycle engine uses 2400 J of chemical energy in fuel.

The thermal energy changed is 1000 J.

The sound energy changed is 600 J.

The remaining energy is changed to kinetic for movement.

Calculate the quantity of kinetic energy changes by the engine.

• 1600 J

• 4000 J

• 800 J

• 2400 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

1. An electric motor changes electrical energy into kinetic and thermal energy.

65% of the electrical energy is changed to kinetic energy.

Determine the percentage of electrical energy changed to thermal energy.

• 0%

• 100%

• 65%

• 35%

Tags

NGSS.MS-PS3-5

According to the Law of Conservation of Energy, when one form of energy is transformed into another, __________ energy is lost in the process

• no

• some

• all

Tags

NGSS.MS-PS3-5

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed

• Energy cannot be created or destroyed, it can only transformed

• Energy can't be created, destroyed or transformed

• Energy cannot be created or destroyed.

Tags

NGSS.MS-PS3-4