How Do We Use Energy?

On a waterwheel, the water falls and causes the wheel to turn. What form of energy is being used to turn the wheel?

• electrical energy

• mechanical energy

• thermal energy

• sound energy

Tags

NGSS.MS-PS3-5

Which two forms of energy are most commonly used to cook food in an oven?

• light energy

• electrical energy

• thermal energy

• sound energy

Tags

NGSS.MS-PS3-3

Which of the following statement is an example of sound energy that has electrical energy as its source?

• girls playing the flute

• a boy clapping

• a dog barking

• speakers at a football game

When an animal or machine makes a noise, it sends sound waves out into its environment. Sometimes those sound waves bounce off other objects and the sound wave is reflected back to what made the noise. This is why you can hear your voice repeated in a cave or large empty space. What is a reflected sound wave called?

• pitch

• echo

• vibration

• pulse

Tags

NGSS.MS-PS4-2

Which object only requires mechanical energy to perform its main function?

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Tags

NGSS.MS-PS2-2

Which object requires only mechanical AND electrical energy to perform its main function?

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Submarines are equipped with a system called SONAR which allows them to locate structures such as buried pipelines and sunken ships deep under the ocean's surface. SONAR works by sending out sound waves which bounce off of structures and returning them to the sub. By tracking how long it takes for the sound waves to return, the crew can determine where and how large obstacles ahead are. Which animal has an adaptation similar to SONAR to locate its prey?

• a prairie dog's warning call

• a cardinal's mating call

• a frog's croaking

• a bat's echolocation

Tags

NGSS.MS-PS4-1

A student uses a hot plate to boil water in the science lab. Which of these objects uses the same source of energy as the hot plate?

• a guitar using mechanical energy

• a teapot using thermal energy

• a phone using sound energy

• a lamp using light energy

Tags

NGSS.MS-PS3-3

Which object requires only mechanical energy to perform its main function?

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Which of the following statements is an example of the use of thermal energy?

• A power plant using falling water to generate electricity.

• A house using heat trapped inside Earth for warmth in winter.

• A student using a solar powered calculator to solve math problems.

• A bat using echoes to locate and navigate its prey.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3