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.

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.

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.

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