CLASS 3 SCIENCE SOUND

Which of the following is NOT a source of noise pollution?

What can happen if we are exposed to extremely loud sounds?

Which of these actions helps reduce noise pollution?

What causes sound?

What is the primary reason sound is considered useful?

What is an example of a natural sound?

How can you make a rubber band vibrate?

What type of sound is produced when someone shouts in your ear?

How does sound travel through the air?

What is an example of a pleasant sound?

What happens when sound travels through a vacuum?

What is the purpose of an ultrasound machine?

What is a primary reason that loud and unpleasant sounds are considered problematic?

Which of the following is an example of a natural sound?

Why is it beneficial to limit our exposure to extremely loud sounds?

Which of the following is NOT a way to reduce noise pollution?

Why are sounds from radios and televisions considered useful?

Which of the following is NOT a characteristic of unpleasant sounds?

What is the primary reason why someone shouting in your ear can harm your hearing?

Which of these is the best example of how sound travels through a solid?

Based on the information provided, what is the connection between vibrations, sound, and our hearing?

What makes 'OM' a unique sound, according to the text?

The sound of a crying child is an example of a natural sound.

Loud, unpleasant sounds are called noise and can cause health problems.

Loud sounds, like thunder, are less likely to cause harm to our hearing compared to soft sounds, like a whisper.

A megaphone is a device used to reduce noise pollution.

To reduce noise pollution, we should try to avoid shouting.

All sounds are considered pleasant, as long as they are not too loud.

Stretching a rubber band around a plastic box and plucking it can demonstrate that vibrations are the source of sound.

Sound can be useful because it allows us to communicate with others.

Sound travels through the air at a constant speed, regardless of the loudness of the sound.

The sound of $'OM'$ is unique because it is thought to generate positive energy and create mental stillness.

Sounds that are pleasing to our ears are called $\text{unpleasant}$ sounds.

Sound is a form of $\text{matter}$ and is what we use to communicate.

The sound of a $\text{whispering}$ child is a pleasant sound

You cannot hear any sound if there is a $\text{vacuum}$ because sound can only travel through air.

Sound can be produced by a $\text{vibration}$ and this vibration can travel through objects.

The sound produced by the movement of a river is considered a type of noise.

Loud music played through a loudspeaker is an example of a natural sound.

The sound of a dog barking is an example of noise pollution.

It is always possible to prevent noise pollution.

Sound waves travel faster through a vacuum than through air.

Sound is produced by a ______.

Sound travels through ______, liquids, and solids.

Loud and unpleasant sounds are called ______.

We hear the sound because it reaches our ______.

To reduce noise, we should not ______, we should not blow horns, and we should not play television or radio at loud volume.

Sounds that are pleasing to our ears are called ______ sounds.

Some sounds are produced by movement of parts of plants, by ______, and by rivers. These are called natural sounds.

Sounds that are not pleasant to our ears are called ______ sounds.

Sound helps us communicate and learn more about our ______.

Extremely loud sounds can damage our ______, so we should avoid being around them.

The ______ of an ambulance informs us that an ambulance is near.

What are loud and unpleasant sounds called?

Give two examples of sounds that can be considered noise.

How can we reduce noise?

What are sounds produced by the natural world called?

Give an example of a natural sound.

In what way is sound useful for communication?

Why should we avoid being around extremely loud sounds?

Explain how sound travels through the air.

What is the difference between pleasant and unpleasant sounds?

Give two examples of natural sounds.

Why is it important to limit our exposure to very loud sounds?

What is an example of a sound that humans cannot hear?

Describe how the sound of 'OM' is said to affect people.

How can we reduce noise pollution?

Explain how sound is produced and give an example.

Why is it harmful to listen to extremely loud sounds for extended periods?

What is the difference between pleasant sounds and unpleasant sounds, and give examples for each?

Describe how sound travels through different materials like air, water, and solids.

Explain why we cannot hear sounds in a vacuum, such as space.

Explain the difference between sounds that are considered 'noise' and sounds that are considered 'natural sounds' based on the information provided. Give an example from the text for each.

Describe two ways that sound can be considered useful, and give specific examples from the text to support your answer.

Why is it important to limit our exposure to extremely loud sounds? What are the potential consequences of prolonged exposure to loud noises?

Identify three examples of actions we can take to reduce noise pollution, based on the information provided.

The text mentions that sounds from radios and televisions can keep us informed and entertained. Using this information, describe at least two other potential uses of sound from technology.