5th Class General Science Chapter 6 Light and Sound MCQs (روشنی اور آواز) | PakMCQs

Sunlight is correct because it illuminates the world, allowing us to see and appreciate the colors and details of our universe.

Rising of the Sun is correct because the appearance of the Sun marks the transition from night to day, bringing light to the world.

Due to its light (Sunlight) is correct because light reflects off objects and enters our eyes, making them visible to us.

Sun and stars are correct because they produce their own light naturally without any human intervention or electricity.

Light of the Sun is correct because it provides the necessary energy for plants to grow, which supports all other life forms.

Nothing would have existed is correct because life cannot survive without the heat and light provided by the Sun.

Artificial sources of light is correct because when natural light is absent, we rely on man-made tools like candles or lamps.

It is reflected sunlight is correct because the moon does not produce its own light or heat; it only bounces back the light from the Sun.

Due to unique sound characteristics is correct because each person has a distinct pitch and tone that allows our brain to identify them.

A form of energy is correct because light is a natural power that allows us to see and provides energy for various processes on Earth.

To prepare their food is correct because plants use solar energy through photosynthesis to create the nutrients they need to survive.

Speed of light is correct because no known object or wave in the universe can travel faster than light.

300,000 km is correct because light travels at this incredible velocity through space and air every single second.

It reflects sunlight is correct because the moon acts like a giant mirror that bounces back the Sun's light toward the Earth.

Luminous objects is correct because these are sources of light that can produce and radiate energy on their own, like a bulb or the sun.

When light striking them is reflected towards our eyes is correct because non-luminous things only become visible when they bounce back light from a luminous source into our sight.

Chair is correct because it does not produce light itself and is only seen when light from another source falls on it.

Stars is correct because they are natural celestial bodies that emit massive amounts of their own light into space.

Luminous objects is correct as these items act as artificial light sources that emit light for our use.

Because it emits light from its body is correct because a firefly has the biological ability to produce its own glow, making it a natural light source.

Due to some chemical reaction is correct because these living organisms use internal biological processes to produce light, a phenomenon known as bioluminescence.

8 minutes is correct because light travels from the distant Sun to Earth across space and reaches us in about eight minutes.

1.5 seconds is correct because the moon is much closer to Earth than the Sun, allowing its reflected light to travel the distance very quickly.

Sunlight takes 8 minutes, Moonlight takes 1.5 seconds is correct as it reflects the vast difference in distances between Earth and these two celestial bodies.

Transparent is correct because these objects have a physical structure that allows light waves to travel through them without being blocked or scattered.

We can see clearly across them is correct because transparent materials do not distort the light passing through, providing a sharp and detailed view of what is on the other side.

Translucent objects is correct because these materials scatter light as it passes through, allowing only some rays to get to the other side.

Only a faint image of the object is correct because translucent materials are not perfectly clear, making objects on the other side look blurry or dim.

Opaque objects is correct because these materials absorb or reflect all the light that hits them, preventing any light from passing through.

Because light cannot pass through them is correct since visibility depends on light traveling to our eyes from an object; if light is blocked by an opaque material, the object remains hidden.

Transparent is correct because optical glasses are designed to let light pass through completely so that the wearer can see the world without any blur.

Opaque is correct because a standard door blocks all light, preventing us from seeing what is on the other side of the room.

Transparent is correct because a window pane allows sunlight to enter a room and enables people to look outside clearly.

Translucent is correct because the material of a net curtain scatters light, meaning you can see shapes but not clear details across it.

Opaque is correct because metal is a solid material that does not allow any light to pass through its surface.

It does not allow light to pass through it is correct because thick materials like bricks absorb or reflect light, making it impossible to see through them.

Translucent is correct because tissue paper is thin enough to let some light through but too textured to show a clear image.

Translucent is correct because while light can enter the liquid, the dark color and bubbles prevent you from seeing clearly through to the other side.

Transparent is correct because most packing tapes are made of clear plastic that allows light to pass through completely, making it invisible on the box.

Translucent object is correct because many plastic sheets allow light to pass but scatter it, making the objects behind them look blurry.

It is an opaque object is correct because the thick fabric of a towel blocks all light rays from passing through it.

Transparent is correct because both the clear plastic and the water allow light to travel straight through, providing a clear view.

Light signals is correct because sailors used lamps or mirrors to send messages between ships over long distances before modern technology.

Transparent is correct because air allows light to pass through it completely, enabling us to see distant objects and receive sunlight clearly.

In a straight line is correct because light always moves in a direct path unless it hits an object or enters a different medium.

Light travels in a straight line is correct because light does not bend on its own to go around obstacles, which is why we cannot see what is behind a wall.

Shadow is correct because it is the dark area formed when light cannot pass through an opaque object.

Similar to the shape of the object is correct because a shadow is basically an outline created by the object blocking light.

In the opposite direction is correct because light travels in a straight line and is blocked on the side facing away from the source.

Its shadow is bigger is correct because when an object is close to the light, it blocks a larger area of light rays.

It becomes smaller is correct because as an object moves away from the light source, it blocks fewer light rays, resulting in a tiny shadow.

The shape of shadow changes is correct because as an object rotates, its outline facing the light source keeps changing, which alters its shadow.

Faint or no shadow is correct because transparent objects allow light to pass through completely, so there is nothing to block and form a dark shadow.

Faint and blurry shadow is correct because translucent materials block only some light and scatter the rest, resulting in a dim and unclear shadow.

Reflection is correct because it is the physical phenomenon where light rays hit a surface and bounce back into the same medium.

Smooth shining surface is correct because surfaces like mirrors or polished metal bounce back almost all the light that hits them, unlike dull surfaces which absorb or scatter it.

No, it has already set is correct because atmospheric refraction bends the sunlight, making the Sun appear on the horizon even when it is actually below it.

Due to reflection of light is correct because the still water of a lake acts like a mirror, bouncing the light from objects into our eyes to form an image.

Due to reflection from the light paper around it is correct because the surrounding white or light paper reflects light to our eyes, creating a contrast with the dark ink that absorbs light.

Various sounds is correct because the constant presence of noise from activities, animals, and people indicates that the world around us is active.

Chirping of birds is correct because it is a natural and rhythmic sound that many people find relaxing and enjoyable at the start of the day.

We become alert is correct because sound acts as a signal that can warn us of danger or grab our attention for important information.

Pressure horns and machine noise is correct because loud and harsh sounds can cause irritation and are generally considered noise pollution.

By vibrations is correct because sound is created when an object moves back and forth rapidly, creating pressure waves in the air.

Vocal cords is correct because these thin bands of muscle in the throat vibrate as air passes through them to produce the human voice.

The strings is correct because when a guitar's strings are plucked, their rapid vibration creates the musical notes we hear.

The drum membrane (skin) is correct because striking the stretched skin of a drum causes it to vibrate and produce a deep sound.

The air column inside is correct because blowing into a flute causes the air trapped inside the tube to vibrate, creating a musical sound.

Air is correct because it acts as the primary medium that carries sound vibrations from the source to our ears.

To vibrate is correct because a vibrating object transfers its energy to nearby air particles, causing them to move back and forth.

Vibrating particles is correct because the chain reaction of particles moving back and forth allows sound energy to travel across a distance.

Wings is correct because when insects flap their wings very rapidly, it creates vibrations in the air that we hear as a buzzing sound.

Because there is no medium (air) in space is correct because sound requires a material like air or water to travel, and space is a vacuum with no air particles.

Yes, through both is correct because sound can travel through any material medium, whether it is a solid, liquid, or gas.

Yes, sound passes through solids is correct because particles in solid objects are packed closely together, which helps them transfer vibrations very efficiently.

Sound can also travel through water is correct because water is a liquid medium that allows sound waves to propagate through its particles.

Buggies or chariots is correct because these were the primary horse-drawn vehicles used for mobility and combat in ancient warfare.

By putting their ears to the Earth's surface is correct because it allowed soldiers to feel the vibrations of approaching horses and vehicles through the ground.

Much later than vibrations is correct because sound travels much slower through gases (air) than it does through solids like the Earth's surface.

The sound is heard instantly and clearly is correct because iron is a solid medium that allows sound vibrations to travel very efficiently and fast.

One through iron and another through air is correct because sound travels at different speeds through the solid fence and the surrounding air.

It is faster through solid objects is correct because the particles in solids are packed tightly, allowing vibrations to pass from one to another very quickly.

Because particles are nearer in solids is correct because the close proximity of atoms in a solid helps the energy of sound waves transfer much faster.

5 times is correct because liquid water is denser than air, allowing sound to propagate at a significantly higher velocity.

15 times is correct as sound travels through solids like iron much more rapidly than it does through the atmosphere.

340 meter per second is correct because it is the standard speed at which sound waves travel through the air at sea level.

1500 meter per second is correct because sound travels much faster in liquids like water than it does in gases.

5000 meter per second is correct because iron, being a dense solid, provides the fastest medium for sound among the three listed.

Because there are no particles in space is correct because sound waves require atoms or molecules to vibrate and carry the energy from one place to another.

A material medium is correct because sound cannot travel through empty space; it needs a solid, liquid, or gas to move.

Both produce sound through vibrations is correct because whether it is a string or an air column, rapid back-and-forth movement is what creates the sound we hear.

Vibrations is correct because sound energy travels by causing the surrounding matter particles to shake or vibrate in a chain reaction.

Faint and loud sounds is correct because sound levels vary greatly in nature, ranging from very soft whispers to very noisy engines.

Loudness is correct because the intensity of a sound wave is a measure of the energy it carries, which we perceive as how loud it sounds.

The louder the sound, the greater is its intensity is correct because high-volume sounds carry more acoustic energy than faint sounds.

Intensity decreases with the increase of distance is correct because sound waves spread out as they travel, making the energy weaker the further you are from the source.

Pleasant sounds is correct because these are the sounds that provide a sense of comfort and enjoyment to our ears.

Harsh and irritant is correct because some sounds are rough and cause discomfort or annoyance to the listener.

Unpleasant sounds is correct because it refers to any sound that lacks harmony and feels disagreeable to hear.

Noise is correct because it is defined as unwanted or disordered sound that interferes with communication or comfort.

Noise is correct because dragging furniture or using loud horns produces sudden and harsh sounds that bother others.

Noise pollution is correct because excessive and unpleasant sounds degrade the quality of the environment and can affect human health.

We cannot hear or understand each other is correct because excessive noise interferes with the sound waves of speech, making communication difficult.

Our thinking process is disturbed is correct because a loud environment prevents the brain from focusing and processing information calmly.

We cannot concentrate our attention is correct because noise acts as a distraction that pulls our attention away from the task we are doing.

Digestive and nervous systems is correct as noise creates physical stress that can disturb how our stomach and nerves function.

Headaches and high blood pressure is correct because loud sounds keep the body in a state of high alert, leading to physical pain and stress.

Thinking and concentration are disturbed is correct because effective learning requires a quiet atmosphere to absorb and understand information.

We cannot relax or sleep well is correct because loud sounds trigger the brain to stay active, preventing the body from entering a restful state.

Fatigue and anxiety is correct because noise pollution makes people feel constantly tired and mentally worried.

They are affected badly is correct as animals experience stress and biological disruptions due to loud sounds just like humans.

Their growth is disrupted is correct because noise stress prevents these animals from developing and growing normally.

Cow gives less milk is correct because the stress caused by a noisy environment reduces the animal's ability to produce milk.

Higher than safe limits is correct because urban and industrial areas often produce excessive noise that exceeds the safety standards set by health organizations.

United Nations is correct because this global body provides guidelines and safety notifications to protect people from environmental hazards like noise pollution.

Schools, hospitals, and libraries is correct because these places require a quiet environment for patients to recover and students to study without disturbance.

Unnecessary use of loudspeakers is correct because loud audio systems contribute significantly to irritating noise in residential areas.

Broken roads and worn-out tyres is correct because damaged surfaces and old tires create loud friction and rattling sounds during travel.

Good quality silencers is correct because these devices are designed to muffle or absorb the loud sounds produced by engines and machinery.

Away from residential areas is correct to ensure that the heavy noise from transport and industry does not disturb the people living in their homes.

They absorb noise is correct because thick belts of trees act as natural barriers that soak up sound waves, making the surrounding area quieter.

They clean the polluted air is correct because trees absorb carbon dioxide and release oxygen, helping to purify the atmosphere we breathe.

Through media and other means is correct because using television, radio, and the internet is the most effective way to educate large numbers of people about health risks.

Because there is no air on the moon is correct because sound waves require a medium like air to travel, and the moon is a vacuum.

Wireless radio system is correct because radio waves can travel through space without needing air, allowing astronauts to stay in contact.