CLASS 3 SCIENCE SOUND

<p>Vibrations (D)</p> Signup and view all the answers

<p>It helps us communicate and learn about our surroundings. (D)</p> Signup and view all the answers

<p>A river flowing (D)</p> Signup and view all the answers

<p>Pluck it (C)</p> Signup and view all the answers

<p>Unpleasant (C)</p> Signup and view all the answers

<p>By the movement of air molecules (D)</p> Signup and view all the answers

<p>The sound of a baby's laugh (C)</p> Signup and view all the answers

<p>It does not travel (D)</p> Signup and view all the answers

<p>To view the internal parts of the body (D)</p> Signup and view all the answers

<p>They can cause damage to our ears. (C)</p> Signup and view all the answers

<p>The sound of a river flowing. (A)</p> Signup and view all the answers

<p>It can prevent hearing loss and potential ear damage. (B)</p> Signup and view all the answers

<p>Using a megaphone to make announcements. (A)</p> Signup and view all the answers

<p>They can provide information and entertainment. (D)</p> Signup and view all the answers

<p>They are always caused by machinery. (A)</p> Signup and view all the answers

<p>The force of the shout vibrates the eardrums too intensely. (C)</p> Signup and view all the answers

<p>Feeling the vibrations of a bass drum through the floor. (D)</p> Signup and view all the answers

<p>Vibrations create sound waves that our ears convert into electrical signals for the brain to interpret. (A)</p> Signup and view all the answers

<p>It produces an instant positive vibration that fosters a state of mental stillness. (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>vibration</p> Signup and view all the answers

<p>air</p> Signup and view all the answers

<p>noise</p> Signup and view all the answers

<p>ears</p> Signup and view all the answers

<p>shout</p> Signup and view all the answers

<p>pleasant</p> Signup and view all the answers

<p>animals</p> Signup and view all the answers

<p>unpleasant</p> Signup and view all the answers

<p>surroundings</p> Signup and view all the answers

<p>ears</p> Signup and view all the answers

<p>siren</p> Signup and view all the answers

<p>Noise</p> Signup and view all the answers

<p>Examples include horns from vehicles, loud music, and loudspeakers.</p> Signup and view all the answers

<p>We can reduce noise by avoiding actions like shouting, blowing horns, and playing loud music.</p> Signup and view all the answers

<p>Natural sounds</p> Signup and view all the answers

<p>Examples include the sound of a river, the chirping of birds, or the rustling of leaves.</p> Signup and view all the answers

<p>Sound helps us communicate by allowing us to speak, listen, and understand each other.</p> Signup and view all the answers

<p>Loud sounds can damage our ears and lead to hearing loss.</p> Signup and view all the answers

<p>Sound travels through the air as vibrations. These vibrations cause air molecules to move close together and then spread apart, creating a wave that travels to our ears.</p> Signup and view all the answers

<p>Pleasant sounds are enjoyable to hear, while unpleasant sounds, often called noise, can be irritating or even harmful.</p> Signup and view all the answers

<p>Examples of natural sounds include the chirping of birds and the sound of a river flowing.</p> Signup and view all the answers

<p>Loud sounds can damage our eardrums and affect our hearing capacity.</p> Signup and view all the answers

<p>Ultrasound is a sound that humans cannot hear.</p> Signup and view all the answers

<p>According to the text, the sound of 'OM' produces positive vibrations and brings a state of mental stillness.</p> Signup and view all the answers

<p>We can reduce noise pollution by avoiding loud activities like shouting, blowing horns, and playing loud music.</p> Signup and view all the answers

<p>Sound is produced by vibrations. When an object vibrates, it creates sound waves that travel through a medium like air, water, or solids. For example, when you strike a drum, the drumhead vibrates, creating sound waves that we hear.</p> Signup and view all the answers

<p>Loud sounds can damage our eardrums, which are the delicate membranes in our ears that vibrate in response to sound waves. This damage can lead to hearing loss and other auditory problems.</p> Signup and view all the answers

<p>Pleasant sounds are sounds that are pleasing to our ears. Examples include music, the chirping of birds, or the laughter of a baby. Unpleasant sounds, also called noise, are sounds that are jarring or disturbing. Examples include loud car horns, construction noise, or a vacuum cleaner.</p> Signup and view all the answers

<p>Sound travels through vibrations that move from molecule to molecule. In air, the sound vibrations travel through the air molecules. Similarly, sound travels through water and solids, causing the molecules in these materials to vibrate and pass the sound along.</p> Signup and view all the answers

<p>Sound requires a medium, like air, water, or solids, to travel. In a vacuum, there are no molecules to vibrate, so sound cannot travel through it. This is why astronauts in space cannot hear each other without using communication devices.</p> Signup and view all the answers

<p>Noise refers to loud and unpleasant sounds, such as those caused by vehicles, loudspeakers, or loud music. These sounds can be disturbing and are often harmful. Natural sounds are produced by the environment, like the movement of plants, animals, or rivers. These sounds are generally pleasant and are considered part of our natural world. An example of noise could be the sound of a car horn, and an example of a natural sound could be the sound of a river flowing.</p> Signup and view all the answers

<p>Sound is useful for communication and learning about our surroundings. For example, the sound of an ambulance siren alerts us to its presence, providing vital information. Also, sounds from radios and televisions provide entertainment and keep us informed about the world around us.</p> Signup and view all the answers

<p>Prolonged exposure to loud sounds can damage our ears, potentially leading to hearing loss. This is because loud sounds cause vibrations that can physically harm the delicate structures within our ears.</p> Signup and view all the answers

<p>To reduce noise pollution, we should avoid shouting, avoid blowing horns, and avoid playing televisions or radios at loud volumes.</p> Signup and view all the answers

<p>Beyond news and entertainment, technological sounds can be used as alarms, reminders, and even warnings. For example, a phone's ringtone alerts us to an incoming call, and alarm clocks wake us up in the morning. We could also use sound for instructional purposes, such as instructional videos with audio explanations.</p> Signup and view all the answers

Loud and unpleasant sounds that can disturb and harm health.

Sounds produced by nature, such as animals, plants, and rivers.

Disturbing noises can lead to various health issues in humans and animals.

Ways to minimize loud sounds, like not shouting or playing music loudly.

Sound aids in communication and awareness of surroundings, like sirens indicating danger.

A form of energy produced by vibrations that can be heard by humans.

A rapid back-and-forth motion that produces sound when an object is struck.

Sound is produced when an object vibrates, causing air particles to move.

Sound can travel through gases, liquids, and solids, not through a vacuum.

Sounds that are pleasing to our ears, such as music or laughter.

Sounds that are harsh or annoying, like shouting or loud noises.

A type of sound that is above the hearing range of humans used in medical imaging.

A thin membrane that vibrates when sound waves hit it, allowing us to hear.

Sound is produced when an object vibrates, creating waves.

Pleasant sounds are enjoyable, while unpleasant sounds can be annoying or harmful.

Common sources of disturbing sounds include horns, loudspeakers, and loud music.

Loud noise can disturb peace and cause health issues in humans and animals.

Sounds like those from plants, animals, and rivers are considered natural sounds.

Sound helps with communication and awareness, like sirens alerting us.

To protect hearing, avoid shouting and loud music.

Sound can travel through air, liquids, and solids but not through a vacuum.

Loud sounds can harm eardrums and affect hearing ability.

Pleasant sounds are enjoyable, while unpleasant sounds are harsh or annoying.

Noise can cause various health problems in humans and animals.

Sources of noise include vehicle horns, loud music, and loudspeakers.

Sound is essential for communicating and gaining awareness, e.g., ambulance sirens.

Loud and unpleasant sounds that are disruptive.

Exposure to loud sounds can lead to hearing loss and stress-related issues.

Sounds produced by nature, like animals or flowing rivers.

Ways to manage and lower noise levels in our environment.

Sound helps convey important information, warning or informing us about surroundings.

Sound travels through gases, liquids, and solids but cannot travel through a vacuum.

Avoiding noise can decrease stress and health risks.

Sounds created by nature, like those from animals or rivers.

Loud sounds can disrupt peace and lead to stress or hearing loss.

Reduce noise by minimizing shouting and loud music.

Sound is key for alerting us, like ambulance sirens indicating urgency.

Sound is a form of energy created by vibrations.

Sound travels through gases, liquids, and solids, not through a vacuum.

Strategies to minimize noise, like speaking softly and lowering music volume.

Sound travels through matter via vibrations, including gases, liquids, and solids.

Sound is a form of energy that impacts our levels and emotions.

Excessive or harmful noise that disrupts the environment.

Issues caused by exposure to loud noise, affecting wellness.

Methods to lower noise levels, such as speaking softly.

Sounds like ambulance sirens alert us to emergencies.

Severe sounds can damage hearing and cause stress.

Using sound to share information about our surroundings.

Loud noise can lead to hearing loss and stress.

Avoid shouting or loud music to minimize disturbance.