Sound Stage 5

Open Ended

How does a sound travel from a source to our ears?

Open Ended

How are sounds made?

Multiple Choice

Which of the following best explains what happens when you rub a wet finger around the rim of a glass bowl, as shown in the image?

• The glass vibrates and produces sound waves.

• The water heats up and creates steam.

• The glass changes color due to friction.

• The bowl fills with bubbles.

Multiple Choice

What is the source of sound in the picture with the girl and the airplane?

• The airplane

• The trees

• The girl

• The clouds

Multiple Choice

Which of the following statements best explains how sounds are made?

• Sounds are made when things vibrate.

• Sounds are made when things are still.

• Sounds are made only by musical instruments.

• Sounds are made only by animals.

Multiple Choice

What happens to the guitar strings when you pluck them?

• They vibrate and produce sound.

• They break.

• They become silent.

• They change color.

Open Ended

Why did the rice grains move when you hit the jar in the experiment?

Fill in the Blank

The plastic wrap ___ when you hit the jar.

Open Ended

Explain why it is important to keep the sound source the same when investigating how sound travels through different materials.

Multiple Choice

Which of the following is an example of a control variable in the investigation of how sound travels through different materials?

• The type of sound source used

• The material sound travels through

• The loudness of the sound

• The distance between the source and the ear

Multiple Choice

Which of the following materials can sound travel through, according to the investigation instructions?

• Only solids

• Only liquids

• Solids, liquids, and gases

• Only gases

Multiple Choice

What are independent variables in the experiment to test how well sound travels through different materials?

• The loudness of the sound

• The materials sound travels through

• The type of sound source

• The number of people listening

Open Ended

Why might sound travel differently through air, water, and solids?

Fill in the Blank

The loudness of the sound that is measured in the experiment is called the ___ variable.

Multiple Choice

Which of the following best describes a controlled variable in a scientific investigation about sound?

• The variable you keep the same throughout the experiment

• The variable you change to test its effect

• The variable you measure as a result

• The variable that is not important

Multiple Select

Based on the investigation of how sound travels through different materials, which of the following can be independent variables?

• Type of material (solid, liquid, gas)

• Loudness of the sound

• Source of sound

• Shape of the material

Fill in the Blank

The loudness of the sound is called the ___ variable.

Open Ended

Explain how pitch allows bats and elephants to communicate in ways that humans cannot hear. Use examples from the image.

Multiple Choice

What unit is used to measure the relative intensity of a sound?

• Decibel

• Hertz

• Watt

• Meter

Multiple Choice

What happens to the frequency of vibration when the pitch of a sound increases?

• It increases

• It decreases

• It stays the same

• It disappears

Multiple Choice

Which of the following best describes a low-pitched sound?

• A sound produced by high-frequency waves and is loud

• A sound produced by low-frequency waves and is deep and quiet

• A sound that is always easy to hear

• A sound that is produced by fast vibrations

Open Ended

Explain how elephants and bats use pitch in their communication and why humans cannot hear these sounds.

Fill in the Blank

The frequency range of human hearing is approximately ___ Hz to ___ kHz.

Multiple Select

Which of the following statements are correct about pitch and hearing in animals and humans?

• Elephants use infrasound to communicate over long distances

• Bats use ultrasonic sounds for echolocation

• Humans can hear all sounds made by elephants and bats

• Human ears can detect sounds from 20 Hz to 20 kHz

Multiple Choice

Which animal uses high-pitched sounds for echolocation that are beyond the range of human hearing?

• Elephant

• Dog

• Bat

• Cat

Multiple Choice

Which of the following best explains how sound is produced in the experiment shown in the image?

• By creating vibrations in the water and bowl

• By heating the water

• By dissolving salt in the water

• By shining light on the bowl

Open Ended

What did you learn about how sounds are made during this lesson?