Lesson Quiz: Energy Transfer and Transformation

An ice cube is placed in a glass of warm tea. Later, the ice has melted, and the tea is cooler. Which statement describes the transfer of energy?

• Energy has been transferred from the ice cube to the warm tea.

• Light energy from the warm tea has been transferred to the ice cubes.

• Energy from the warm tea has been transferred to the ice cubes and the glass.

• Electrical energy has been transferred from the tea to the surrounding air and glass Александра

A company that makes batteries has assigned a group of engineers and scientists to design a new type of battery. Which pair of scientist and engineer would make the best team to work on the project?

• An engineer who is designing a new battery and a scientist who studies how to store energy.

• An engineer who is testing existing batteries and a scientist who studies converting heat to electricity.

• An engineer who is designing a new battery and a scientist who studies converting stored energy to motion.

• An engineer who is testing existing batteries and a scientist who studies converting stored energy to electrical energy.

Into which other kinds of energy does a light bulb transform electrical energy? Circle the letters of the two correct answers.

• chemical

• heat

• light

• motion

• sound

Identify where the energy comes from to toast the bread in an electric toaster.

• Solar energy

• Chemical energy in bread

• Electrical energy from the power supply

• Mechanical energy from the toaster

Describe the energy transformations that happen when the students use the toaster.

• Electrical energy is transformed into heat energy.

• Heat energy is transformed into electrical energy.

• Mechanical energy is transformed into light energy.

• Chemical energy is transformed into sound energy.

Identify a device in your home that uses stored chemical energy.

• Television

• Battery-powered flashlight

• Ceiling fan

• Wi-Fi router

Many devices use stored chemical energy. Which of the following devices uses stored chemical energy and involves energy conversions?

• A flashlight

• A wooden chair

• A glass of water

• A plastic bag