Forms of Energy/Transformations

Which of the following statements most accurately describes how a ipod is able to play music after it has been plugged in?

• The ipod is able to play music because it is using up the electrical energy from the wall.

• The electrical energy is transferred from the wall allowing the ipod to make sound energy as music.

• The ipod is able to play music because the outlet is creating electrical energy that is transformed to sound energy.

• The electrical energy from the outlet is transformed to chemical energy and then to sound and light energy when the ipod is used to play music.

Tags

NGSS.MS-PS3-5

How does the Law of Conservation of Energy apply to the changes in potential and kinetic energy of a marker as it falls to the floor?

• Potential energy is converted into kinetic energy.

• Kinetic energy is converted into potential energy.

• Kinetic energy is created as potential energy is destroyed.

• Potential energy is created as kinetic energy is destroyed.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-2

A bouncy ball falls off a shelf and bounces several times. Each bounce is lower than the one before. Soon the ball stops. Why doesn’t the ball keep bouncing?

• The energy becomes stored in the ball.

• Some of the energy is changed into mass.

• Energy is transferred to the air and ground.

• The air and ground slowly destroy the ball’s energy.

Tags

NGSS.MS-PS3-5

Ms. Lewis is a chemist mixing two solutions together. A chemical reaction takes place, and the solution becomes warm. Which statement best describes what has happened?

• Energy has been created in the form of thermal energy.

• Energy has been transferred from one form to another.

• More energy has been created than has been destroyed.

• The chemical energy of the solution has been destroyed.

Tags

NGSS.MS-PS3-5

Using your knowledge of the Law Conservation of Energy, which statement below describes why the cheetah at Busch Gardens (roller coaster) eventually slows and then comes to a stop.

• The roller coaster lost its potential and kinetic energy.

• The roller coaster lost all of its kinetic energy.

• The roller coaster converted its potential and kinetic energy into thermal and sound energy

• The roller coaster gained thermal and sound energy.

What is the energy transformation for a girl riding her bike in the park?

• Radiant → Mechanical → Sound

• Chemical → Mechanical → Sound

• Thermal → Mechanical → Sound

• GPE → Mechanical → Sound

What energy transformations take place when a hair dryer is used to dry a dogs hair?

• Energy from the sun is transformed to chemical energy.

• Electrical energy from the circuit is transformed to electromagnetic energy.

• Electrical energy from the circuit is transformed to thermal energy and sound energy.

• Electromagnetic energy from the circuit is transformed to thermal energy and sound energy.

What is the Law of Conservation of Energy?

• Energy is never created, but can be destroyed when heat is created in an exchange.

• Energy is never destroyed or created except when there is a nuclear reaction.

• Energy is never created or destroyed. It is only created when energy is created from matter.

• Energy is never created or destroyed; it is only transformed from one form of energy to another.

Which type of energy is a form of electromagnetic energy?

• Chemical

• Light

• Kinetic

• Sound

When Rocket 1616 launched, Anna felt the warmth produced by the firing engines. Which form of energy was she feeling during the launch?

• chemical

• light

• sound

• thermal