Types of Energy Transfer

Which best describes how energy changes in a toaster.

• chemical to thermal

• electrical to light

• electrical to thermal(heat)

• electrical to chemical

Lola placed a flask of room-temperature water over a flame. When the water started to boil, she placed a room-temperature copper rod into the flask. During the experiment, Lola wrote the four notes shown above in her lab journal. Which notes are observations supporting the idea that energy can be transferred from one place to another? Select each correct answer. More than one answer may be correct

• It is harder to see through the water when it is boiling.

• The temperature of the water went up when it was over the flame.

• The flask containing the boling water was made of glass.

• After five minutes in the flask, the end of the copper rod was hot to the touch.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The diagram below represents a series of energy transformations. The Sun transfers a certain type of energy to a solar panel. The solar panel transforms that energy into another form. The energy is then transferred to a music speaker. The speaker transforms the energy again and then transfers it through the air. Which type of energy is associated with each transfer? Select the correct order above.

• thermal -> sound -> electrical

• thermal -> light -> chemical

• light -> electrical -> sound

• light -> chemical -> electrical

Energy is changed from one form to another during an energy transformation. Which of the following is an example of a transformation of electrical energy into another kind of energy?

• a light bulb lighting up

• a motor making a noise

• a heater feeling warm

• all of these

Sean loves riding his bike, but his parents will not let him ride it in the evenings. They say that it is dangerous because drivers cannot see him from very far away. Sean thinks of several solutions that could solve his problem. Which of these solutions would change stored energy into light energy? Select EACH correct answer. More than one answer may be correct.

• Sean could put solar-powered lights on the bike. After sitting in the sun all day, the lights will shine when turned on.

• Sean could put electric lights on the bike. Then he could use batteries that can be charged every night by hooking them up to an electrical outlet.

• Sean could put electric lights on the bike. Then he could use a small windmill to change the energy of the bike's motion into electricity for the lights.

• Sean could put reflectors on the bike. When light hits the reflectors, it will bounce off in many directions.

Tags

NGSS.MS-ETS1-2

Electrical energy can produce many other types of energy. When electricity runs through a light bulb, what other type of energy is produced?

• light energy

• mechanical energy

• chemical energy

• sound energy

Above is a sketch Wilton made of his solution to an engineering design problem. When the fan spins, the light bulb turns on. What was Wilton's solution designed to do?

• use moving air to produce stored energy

• use light energy to move air

• use moving air to produce light energy

• use stored energy to move air

Tags

NGSS.MS-PS3-5

Stevan is playing in the park on a sunny summer day. The park he is playing at has both grass and asphalt. Stevan notices that the asphalt feels hotter than the grass in the park. What statement explains the energy transfer in the asphalt?

• Some of the light energy from the asphalt is transferred into heat energy in the Sun.

• Some of the heat energy from the asphalt is transferred into light energy in the Sun.

• Some of the light energy from the Sun is transferred into heat energy in the asphalt.

• Some of the heat energy from the Sun is transferred into light energy in the asphalt.

Tags

NGSS.MS-PS3-4

A solar panel collects light from the Sun. The light can then be used to make electricity. In this example, _______ was transferred from the Sun to the solar panel.

• sound

• electricity

• motion

• energy

Electrical energy can produce many other types of energy. When electricity runs through an electric stove, what other type of energy is produced?

• heat energy

• sound energy

• chemical energy

• mechanical energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3