energy transformations

What is the best example of a machine that converts electrical energy into kinetic energy and sound energy?

• an electric toothbrush
• a toaster
• a flashlight
• an iron

What best describes the energy conversion that occurs when you turn on a hair dryer?

• electric to kinetic to thermal and sound
• chemical to thermal to light and sound
• nuclear to electrical to thermal and sound
• kinetic to light to thermal and sound

What best describes the energy conversion that takes place in a microwave oven?

• electrical to light to thermal
• chemical to thermal to light
• electrical to thermal to sound
• nuclear to thermal to chemical

Turning on a lamp is an example of energy transformation from electrical to 3 forms of energy. Which of these is NOT created by the lamp?

• radiant
• light
• heat
• chemical

Which of the following energy transfers occurs when food is digested?

• chemical to mechanical
• radiant to nuclear
• mechanical to potential
• thermal to chemical

In energy transformations, "wasted energy" usually takes what form?

• heat
• chemical energy
• light
• sound waves

Tags

NGSS.MS-PS1-4

What kind of energy transformation takes place in this system?

• chemical to electrical to light
• electrical to chemical to light
• electrical to light to chemical
• light to chemical to electrical

Which is an example of radiant energy to thermal energy transformation?

• a greenhouse
• an electric stovetop
• an electric stove
• a car's brakes

During most energy transformations and transfers, wasted energy takes the form of __.

• electromagnetic radiation
• sound waves
• random mechanical movements
• heat

What is the best example of a device that converts electrical energy to thermal energy?

• a toaster
• a clock radio
• a flashlight
• an electric toothbrush