Energy Conversion Review

What is the energy conversion when you plug in a stereo and listen to music?

• electrical --> mechanical

• chemical --> heat

• electrical --> sound

• potential --> sound

What is the energy conversion when darkness goes away after a sunrise?

• potential --> nuclear

• nuclear --> potential

• nuclear --> light

• chemical --> nuclear

Tags

NGSS.HS-ESS1-1

An interesting thing about energy is that it cannot be created or destroyed. It simply changes from one form to another. What energy change takes place when using a hair dryer?

• Sound energy changes to chemical energy

• Heat energy changes to electrical energy

• Light energy changes to mechanical energy

• Electrical energy changes to heat energy

Ellason created the diagram below to show how a device changes one form of energy to another. Which energy change does the diagram show?

• electrical energy turns into mechanical energy which turns into sound energy

• mechanical energy turns into electrical energy which turns into sound energy

• chemical energy turns into sound energy which turns into gravitational energy

• chemical energy turns into electrical energy that turns into sound energy

In order to power an elevator, a motor must convert electrical energy into which type of energy?

• Thermal Energy

• Mechanical Energy

• Nuclear Energy

• Light Energy

What kind of energy transformation is taking place when a hair dryer is used?

• Mechanical energy is being transformed into thermal energy

• Magnetic energy is being transformed into wind energy

• Electrical energy is being transformed into thermal energy

• Sound energy is being transformed into electrical energy

Tags

NGSS.MS-PS3-3

Which picture shows the transformation of electrical energy into thermal energy?

• Q

• R

• S

• T

Coal is the fuel source used to power the steam engine on trains. Which statement best describes the energy transfer that takes place in a train powered by a steam engine?

• The coal's chemical energy is transformed into mechanical energy

• Most of the coal's chemical energy is destroyed as the coal is burned

• The coal's electrical energy is captured and used to power the train.

• All of electrical energy is released as heat and light when it is burned

Tags

NGSS.MS-PS3-5

What transformation occurs when a telephone rings?

• Electrical energy is transformed into kinetic energy

• Potential energy is turned into sound energy

• Sound energy is transformed into thermal energy

• Electrical energy is transformed into sound energy

Lena is playing with a remote-controlled car in her backyard. She knows that the car uses its wheels to move and is powered by a battery. Which of the following describes how the car uses energy to move?

• Mechanical energy transforms to heat energy

• Electrical energy transforms to light energy

• Heat energy transforms to mechanical energy

• Electrical energy transforms to mechanical energy

Tags

NGSS.MS-PS3-5