Forms of Energy

Which of the following is an example of observing mechanical energy?

• Seeing a firecracker making sparks in the night sky

• Listening to a change in pitch from a car horn while it moves away

• Watching a large rock rolling down the side of a mountain

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

One type of energy is the result of waves that travel through matter and cause particles in the matter to vibrate. Which type of energy is it?

• Sound

• Mechanical

• Electrical

• Chemical

Tags

NGSS.MS-PS4-1

Allison is putting new batteries in her flashlight. Which type of energy is stored in the batteries?

• Mechanical

• Chemical

• Light

• Heat

A student turns on an electric lamp. She notices that the energy from the electricity is transformed into two other forms.

What are these two forms?

• 1. Light and electricity

• 1. Light and heat

• 1. Light and motion

• 1. Light and mechanical

Tags

NGSS.MS-PS1-4

A student plugs headphones into a computer to listen to a lesson on the Internet. Which of the following best describes the energy transformation that occurs from the computer to the student's headphones?

• 1. Electrical to light

• 1. Electrical to sound

• 1. Sound to electrical

• 1. Mechanical to light

A student asks her mother to help her make tea. They put a tea kettle on a hotplate and turn it on. After about 10 minutes, the tea kettle starts to whistle. What energy transformations have taken place?

• Electric to sound to light

• Sound to heat to light

• Electric to heat to sound

• Electric to chemical to sound

Jill is studying the appliances in her home. All of the appliances transform electrical energy into other forms of energy. Which of the following shows an appliance that transforms electrical energy into heat energy?

• Battery

• Iron

• Blender

• Piano Keyboard

Batteries store energy in the form of chemical energy. The chemical energy is converted into electrical energy, which can be used to create motion. Which of these is a battery-powered item where the energy of the battery is used to create motion?

• Laptop

• Fan

• Cellphone

• Flashlight

Tags

NGSS.MS-PS3-5

Jack is completing an experiment comparing the length of a guitar string to the pitch it produces. He makes a chart of his results.

What can Jack conclude about how the length of the guitar string affects the pitch?

• The shortest string will vibrate quickly and produce a high pitched sound

• The longer string will vibrate quickly and produce a low pitched sound

• The shortest string will vibrate slowly and produce a low pitched sound

• The longer string will vibrate slowly and produce a high pitched sound

Tags

NGSS.MS-PS4-1

Jason stretches a rubber band between his fingers, as show below. When he plucks the rubber band, it makes a sound.Which of the following best explains why the rubber band makes a sound when Jason plucks it?

• It releases molecules into the air

• It vibrates the air

• It absorbs energy from the air

• It heats the air

Tags

NGSS.MS-PS4-2