What is Sound? Just Listen

For questions 1-5, use the article "Just Listen."

Which sentence best states the main idea of the passage?

• Some noises are loud and others are quiet.

• Vibrations create sound waves that let us hear noises.

• There is no air or sound in outer space.

• The faster your eardrum vibrates, the higher the sound you will hear.

Based on "Just Listen", what does the author most likely think about how people hear?

• Learning how people understand sounds is very interesting.

• It is strange that all sounds do not return to where they start.

• It is hard to find out how people make sense of sounds.

• The fact that there is no sound in space is a problem.

What question does paragraph 3 of "Just Listen" help answer?

• How do ears take in sounds?

• What do eardrums do?

• How do noises travel?

• What do sounds feel like?

According to the article, "Just Listen," which sentence explains why there are no sounds in outer space?

• Sound waves cannot travel fast enough to be heard in space.

• Sound waves cannot bounce off things in space.

• There is no air in space for sound waves to travel through.

• There are no people or animals in space to hear sound waves.

In the article, "Just Listen," what happens right after sound waves cause the eardrum to vibrate?

• The brain makes sense of what is heard.

• Nerve hairs send signals to the brain.

• Sound waves travel through the ear canal.

• Some sound waves cause lower sounds.

What is a central idea in both passages?

• There is no sound in outer space.

• Nerve hairs help change sound waves into messages the brain can understand.

• Taking care of your ears is very important.

• Sound is made of vibrations that travel through solids, liquids and gases.

Select two details from the article, "What is Sound? that support the central idea that sound is a vibration that travels through a solid, liquid or gas.

• Sound, like light is a form of energy.

• Sound waves move out from a vibrating object, making the air move back and forth.

• The next time you turn on your radio or TV, lightly put your fingers on the speakers.

• Sound travels not only through air, which is a gas, but through other mediums.

• One place that sound cannot travel is in outer space.

In the article, "What is sound?" what does the word medium mean as it is used in this sentence.

Sound travels not only through air, which is a gas, but through other mediums. In fact, sound can travel through solids, liquids, and gases.

• fortune teller that can tell the future

• middle thing or condition

• not large or small

• a substance that allows something to travel through it

In the article, "What is Sound?" what does the word vacuum mean in the sentence, "Sound cannot travel through the emptiness, or vacuum, of space."

• the action of sucking things up

• a machine that cleans

• emptiness

• space

Organize these options into the right categories

Groups:

(a) Just Listen

,

(b) What is Sound?

,

(c) Both articles

• Explains how your brain hears sound through your ear.

• There is no sound in outer space because there is no air for the sound to travel through.

• Explains that sound is made of vibration

• Gives the example of how voices are different underwater