Magic of Senses Notes Questions and Answers Class 5 Basic Science Chapter 7 Kerala Syllabus (2025)

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Magic of Senses Class 5 Questions and Answers Notes

Class 5 Basic Science Chapter 7 Question Answer Notes Pdf Magic of Senses

Basic Science Class 5 Chapter 7 Question Answer Kerala Syllabus

Let Us Assess

Question 1.
There are restrictions on working hours during extreme summer. What may be the reason?
Answer:
There are restrictions on working hours during extreme summer for several reasons:

• Heatstroke Risk: Excessive heat exposure can lead to heatstroke, a serious condition that can be fatal.
• Dehydration: High temperatures can cause dehydration, leading to fatigue, dizziness, and other health problems.
• Reduced Productivity: Extreme heat can negatively impact cognitive function and physical performance, reducing work efficiency.
• Worker Safety: To prevent accidents and injuries that may occur due to heat-related fatigue and discomfort.
• By reducing working hours during extreme heat, employers can help protect their employees health and well-being.

Question 2.
What features of an object can be understood through sight, hearing, and touch? Complete the list below.

Answer:
Sight:

• Colour
• Shape
• Size
• Texture (roughness, smoothness)
• Distance
• Movement

Hearing:

• Sound (loudness, pitch)
• Material (metal, wood, glass)

Touch:

• Temperature (hot, cold)
• Texture (roughness, smoothness)
• Weight
• Shape (basic shapes)
• Hardness
• Vibration

Question 3.
The special organs of creatures are marked in the pictures. Find out and write down how each of them helps the creatures.

Answer:

• Cat’s whiskers: Help the cat feel things around it, even in the dark.
• Elephant’s Trunk: It’s like a hand and nose combined. It helps the elephant eat, drink, and sense things.
• Butterfly’s Tongue: Help the butterfly to suck nectar from flowers.
• Cockroach’s Antennae: Help the cockroach smell and feel its surroundings.

Extended Activities

Question 1.
There is a variety in the sense organs of different creatures. Prepare an album including the pictures of these creatures.
Answer:
Animals with Unique Sensory Adaptations:

• Eagle: Known for their sharp eyesight, which helps them spot prey from great distances.
• Bat: Uses echolocation to navigate and hunt in the dark.
• Snake: Detects heat with specialised pits on their faces, allowing them to hunt warm-blooded prey.
• Shark: Has electroreceptors that can sense the electrical fields of other animals, even in dark water.
• Star-nosed Mole: Has a unique nose with 22 fleshy tentacles that help it to navigate and find food in the dark.

Question 2.
Design a new device that can be effectively used by visually and aurally challenged persons. Prepare a sketch and describe the making procedure in your Science Diary.
Answer:
A smart home system that voice commands and tactile interfaces can control: This system would allow users with visual and hearing impairments to control their home environment using voice commands or tactile interfaces. This could include controlling lights, appliances, and security systems.

Magic of Senses Notes Questions and Answers

Question 1.

You have read what each creature has said, haven’t you? What are the special abilities of these creatures to recognise their surroundings? Examine the illustration and complete the table below.

Answer:

These organs help the creatures to understand their surroundings through sight, touch, hearing, smell and taste.

Question 2.
Similarly, which are the organs that help us to understand our surroundings?
Answer:

• Eyes — Sight
• Ears — Hearing
• Skin — Touch
• Tongue — Taste
• Nose — smell

Question 3.
Is it easy to recognise objects without the help of the eyes?
Answer:
No, it is not easy to recognise objects without the help of eyes.

Question 4.
Are the eyes of other creatures similar to our own eyes? Look at the position of the eyes of the creatures in the picture.

How does the position of the eyes help these creatures?
Answer:
Animals with eyes on the front of their heads are able to precisely understand the position and distance of the objects. This pecularity of animals like tigers and lions helps them to catch their prey. Animals with eyes on the sides of their heads are able to see both the sides. This feature helps animals like deer and rabbits to escape from their predators.

Question 5.
Classify creatures into groups on the basis of the position of their eyes.
Answer:

Question 6.
Have you seen the notice issued by the health department? What are the symptoms of conjunctivitis?
Answer:

• Pain in the eye
• The whites of your eyes may appear pink or red.
• Eyes may feel itchy or irritated.
• You may experience a burning sensation in your eyes.
• Your eyelids may become swollen.
• Bright light may bother your eyes.

Question 7.
What other eye diseases do you know?
Answer:
Eye Diseases
Myopia

• Nearsightedness is a condition in which near objects are seen but distant objects cannot be seen properly.
• You can see things close up but not far away.
• You might squint to see the blackboard.

Hypermetropia

• Farsightedness is the ability to see distant objects clearly and not see near objects correctly.
• You can see things far away but not close up.
• Reading books might be tricky.
• Special types of glasses are used to solve these problems.

There are letters of different sizes in the chart commonly used for testing eyesight. The letters are arranged in such a way that the size decreases from top to bottom. This was developed by Dutch Ophthalmologist Herman Snellen in 1862.

Question 8.
How do visually challenged individuals understand their surroundings?
Answer:

• Braille: A tactile writing system that enables blind people to read and write.
• Guide Dogs: Trained dogs that assist blind individuals in navigating obstacles, crossing streets, and finding their way.
• Screen Readers: Software programs that read digital text aloud, making computers and smartphones accessible.
• Cane: A mobility aid used to detect obstacles and uneven surfaces.
• Human Guidance: Relying on sighted individuals for assistance, particularly in unfamiliar environments.
• Echolocation: Using sound waves to recognise the environment, similar to bats and dolphins.

Question 9.
Examine the different currency notes. In what ways do they differ? Which features help the visually challenged individuals to recognise the currency note? Prepare a short note.
Answer:

• Raised Numbers: The numbers on the flotes are raised,so they can feel them.
• Different Sizes: Each note has a different size.
• These special features make it casier for everyone to use money.

Question 10.
Look at the pictures.

What are the special features you observed? How do they benefit visually challenged individuals?
Answer:
The images show two special features to help blind people:

• Braille numbers: The numbers in the first picture are written in Braille, which blind people can read by touching.
• Yellow humps on the ground: The yellow bumps in the second picture are a warning for blind people. They can feel the bumps with their feet and know if there is a step or a change in direction.

Question 11.
Which features of the devices like mobile phones, watches, computers, etc. help them?
Answer:
Phones, watches, and computers help blind people:

• Talking: They can talk to the devices to use them.
• Reading: The devices can read things out loud.
• Big letters: The devices can show big letters that are easier to see.
• Vibrations: The devices can vibrate to let blind people know something is happening.

These features make it easier for blind people to do things on their own.

Question 12.
The smart cane and the digital Braille slate are examples for the changes in these systems due to the developments in technology. Collect more information about the features of these devices.
Answer:

• To find the way: It helps to find the way more easily.
• To locate obstacles: Ultrasonic/infrared sensors can be used to locate obstacles in real time.
• Connectivity: Smart canes can be connected through bluetooth to smartphones or other devices.
• To identify falls: It passes information to the concerned if there is a fall and the individual is unable to get up.
• Customisation: Adjustable height, different grips, different sensory feedback arrangements.
• Data collection: They can collect information about distance travelled, walking speed, obstacles faced, etc.

Question 13.
See pictures and instructions in the Health Department’s brochure.

• Do not rub the eyes.
• Do not touch inside the eye.
• Do not watch television in dim light.
• Do not use mobile phones, computers, televisions, etc. for a long period of time.
• Do not use the handkerchiefs used by others.
• Read in a well-lit place.
• Get the eyes tested periodically.
• Include fruits, leafy and other vegetables in the diet.

Do you follow these instructions? What health habits should you follow for the health of the eyes? Write in your Science Diary.
Answer:

• Eat healthy foods: Carrots, spinach, and fish are good for the eyes.
• Rest: Take breaks from screens every 20 minutes.
• Protect eyes: Wear sunglasses when it’s sunny.
• Get enough sleep: Sleep helps eyes rest and recover.
• Visit the eye doctor: Regular check-ups are important

Question 14.
How does the blindfolded child in the picture understand the positions of her friends?
Answer:
Even though she can’t see, she can still hear their voices. By listening to the direction of the sounds, she can figure out where they are. This shows us how important our senses are, especially when one of them isn’t working. Our ears can help us understand our surroundings even when our eyes are closed.

Question 15.
Do we give enough care to protect the ear, the organ that helps us to hear? What should we do in these situations?

Is the grandfather’s advice correct? What should we do in such situations?
Answer:
Do not follow treatment methods without a scientific basis when we can access the service of healthcare professionals directly or over the phone. Use medicines in the ear only according to the instructions of the healthcare professionals. Self-treatment is dangerous. This can even lead to loss of hearing. Water getting inside the ear can cause injury or infection to the ear. This may lead to ear ache and even loss of hearing.

Question 16.
What should we be careful about to avoid such problems?
Answer:

• Don’t put any objects such as pencil, pen, matchstick, safety pin, etc., into the ear.
• Consult a Doctor: Always consult a doctor or healthcare professional for any ear-related problems.
• Avoid Self-Medication: Do not use any medications or home remedies without a doctor’s prescription.
• Keep Ears Dry: After swimming or bathing, dry your ears thoroughly with a clean towel.
• Avoid Using Cotton Swabs: Using cotton swabs can push earwax deeper into the ear canal, leading to blockage and infection.
• Wear Earplugs: Wear earplugs when swimming or showering to prevent water from entering the ear canal.
• Practice Good Hygiene: Keep your ears clean by washing them gently with soap and water.

Question 17.
Look at the picture.

What is the reason for loss of smell when you have a cold?
Answer:
The cold is a condition when the moistness of the nose is produced in excess amounts when there is a viral infection. This will obstruct the nasal passage. So, the odour particles will not reach the cells that help to recognise the smell. That is why we don’t recognise smells when we have a cold.

Question 18.
Does smell also help ¡n understanding the surroundings like sight and hearing? Write your opinion in your Science Diary.
Answer:
Yes, smell can help us understand our surroundings, just like sight and hearing. It can help us:

• Identify dangers: Like smelling smoke from a fire or spoiled food.
• Recognize places: Certain smells remind us of specific places. like the ocean or a bakery.
• Enjoy food: Smell helps us know if food is good or bad.
• Remember things: Smells can trigger memories.

So, while it might not be as strong as sight or hearing, smell is still important for our everyday lives.

Question 19.
What should we be careful of to protect the nose?
Answer:

• Do not put any objects inside the nose.
• Don’t blow your nose forcefully.
• Avoid irritants: Stay away from smoke, dust, and strong chemicals.
• Wash your hands: This helps prevent germs from entering your nose.
• Blow your nose gently: Don’t blow too hard, as it can irritate your nasal passages.
• Moisturize: Use a saline nasal spray to keep your nose moist.
• Protect from injury: Wear a helmet or face mask during sports or activities that could cause injury.
• Avoid picking your nose: This can irritate the delicate lining of your nose and lead to infection.

Question 20.
Secretion particles from the nose and mouth are likely to fall on other people’s bodies while we sneeze or cough. What should be done to avoid this?
Answer:

• Cover the mouth and nose with a clean handkerchief.
• Don’t use the handkerchief used by others.
• Cough or sneeze into your elbow: If you don’t have a tissue, cough or sneeze into the crook of your elbow instead of your hands. This helps contain the germs.
• Wash your hands: After sneezing or coughing, wash your hands thoroughly with soap and water for at least 20 seconds. If soap and water aren’t available, use an alcohol-based hand sanitizer.
• Stay home when you’re sick: If you’re feeling unwell, especially with a cough or cold, stay home to avoid spreading germs to others.

Question 21.
Did you see the different food items in the picture? Do they all taste the same? When is it possible to sense the true taste of food? When is it well chewed or not? Why?
Answer:
Different foods taste different. To truly taste food, we need to chew it well. Chewing breaks down food, releases flavors, and helps us taste better. We sense tastes when it is dissolved in saliva and stimulates the taste buds.

Question 22.
List the tastes of the food you consume in a day.
Answer:

Question 23.
Does the tongue help only in tasting? What are the other functions of the tongue?
Answer:
The tongue does more than just taste. Here are some of its other important functions:

• Chewing and Swallowing: The tongue helps to move food around the mouth, making it easier to chew and swallow.
• Speaking: It’s a key muscle for forming words and sounds.
• Breathing: The tongue helps keep the airway open.
• Cleaning the Mouth: It helps to clean the teeth and gums.

Question 24.
What should be taken care of for the health of the tongue?
Answer:

• Don’t eat extremely hot or cold food.
• Don’t forcefully clean the tongue with a tongue cleaner.
• Drink plenty of water to keep your mouth and tongue moist.
• Limit your intake of acidic foods, spicy foods, and alcohol, as they can irritate your tongue.
• Regular dental check-ups can help identify any potential issues with your tongue.
• Brush your teeth twice a day and floss daily.

Question 25.
Look at the picture. The objects like a ball, beads of different shapes, a glass of cold water, a smooth stone and a rough stone are kept on the table. A child attempts to identify each object blindfolded. Do this activity in our class.

Could you recognise all the objects? How were they recognised? What all features can be recognised through touch? Which organ helped you in this?
Answer:
We were not able to recognise all the objects. By feeling the shape, texture, and temperature of each object, we could make a guess. The skin is the organ that helps us to recognise objects by touch.

Question 26.
What should we be careful of in protecting the skin? Add more instructions and write them in your Science Diary.
Answer:

• We should keep the skin clean.
• We should drink sufficient water.
• We should include leafy vegetables and fruits in our diet that help in the health of the skin.
• Avoid harsh soaps and hot water, which can strip your skin of natural oils.
• Wear protective clothing like hats, sunglasses, and long-sleeved shirts.

Question 27.
Let us conduct an interview with a healthcare professional to know more about the functioning and protection of sense organs. Prepare a questionnaire by including all your doubts. What should be included in the questionnaire?
Answer:
Questions that can be included in the questionnaire:

• How do our five senses work together to help us recognise the world around us?
• Can you explain the process of how we see, hear, smell, taste, and touch?
• How do our brains interpret the signals received from our sense organs?
• Are there any common misconceptions about how our senses work?
• What are the common threats to our sense organs, such as eye strain, car infections, and loss of smell?
• How can we protect our eyes from damage caused by excessive screen time and harmful UV rays?
• What are the best practices for ear hygiene and preventing hearing loss?
• How can we maintain a healthy sense of smell and taste?
• What are some tips for protecting our skin from sun damage and premature aging?
• What are the latest advancements in treating age-related macular degeneration?
• How can we protect ourselves from air pollution affecting our respiratory system?

Basic Science Class 5 Chapter 7 Magic of SensesQuestion Answer Notes

Question 1.
Match the following

Answer:

Question 2.
Find the odd one out.
Skin, Bone, Eye, Ear
Answer:
Bone

Question 3.
Find the odd one out.
Sweet, Salty, Sour, Loud
Answer:
Loud

Question 4.
How many sense organs are present in the human body?
Answer:
Five

Question 5.
As we __________ in, the air enters into the nasal cavity.
Answer:
Breathe

Question 6.
Write each sense where it belongs.
………………….
Answer:
(a) — skin, (b) — ear, (c) — eye, (d) — nose, (e) — tongue.

Question 7.
This is the auditory sense organs of our body.
i) Ears
ii) Eyes
iii) Skin
iv) Tongue
Answer:
i) Ears

Question 8.
The eyes help us to see _______ and _______
Answer:
Colours and shapes.

Question 9.
Give examples of animals that may have a very strong sense of sight, hearing or smell.
Answer:
Sight:

• Eagle: Known for its exceptional vision, eagles can spot prey from very high altitudes.
• Owl: Owls have excellent night vision and can see in low-light conditions.

I fearing:

• Bat: Bats use sound waves to navigate and locate prey in the dark.
• Elephant: Elephants can hear very low-frequency sounds that travel long distances, helping them communicate over large areas.

Smell:

• Dog: Dogs have an incredible sense of smell, which they use for tracking, detecting explosives and drugs.
• Bear: Bears have a strong sense of smell that helps them locate food sources like berries, and fish, from long distances.

Question 10.
How does the eye position of different animals help them in their environment?
Answer:
Animals with eyes in front (e.g.lions, eagles) can better focus and measure distance which aids in hunting. Animals with eyes on the sides (e.g., deer, rabbits) have a wider field of view to detect predators.

Question 11.
Describe symptoms of conjunctivitis and mention some other common eye diseases.
Answer:
Symptoms include red or pink eyes, itching. irritation, and light sensitivity. Other common eye diseases include:

• Myopia
• Hypermetropia
• Cataract

Question 12.
How can visually challenged individuals USC other senses to understand their surroundings?
Answer:
They use Braille for reading, guide dogs, screen readers, canes for mobility, and sometimes echolocation.

Question 13.
Why do people experience a reduced sense of smell when they have a cold?
Answer:
Excess mucus prevents odour particles from reaching the smell receptors in the nose.

Question 14.
What are the special features on currency notes that assist the visually challenged in identifying them?
Answer:
Raised numbers, distinct sizes, and different colours help in recognizing currency.

Question 15.
What role does chewing play in tasting food?
Answer:
Chewing breaks down food and releases flavours, making it easier for taste buds to detect the taste once dissolved in saliva.

Question 16.
What precautions can we take to avoid ear problems?
Answer:

• Keep ears clean and dry.
• Avoid inserting objects like cotton swabs into the ear.
• Protect ears from loud noises by wearing earplugs.
• Don’t swim in dirty water to prevent infections.
• See a doctor if you have pain or notice changes in hearing.

Question 17.
How does the sense of smell help us in our surroundings?
Answer:
Smell can alert us to dangers, like smoke or spoiled food, help us remember places, and enhance the experience of food.

Question 18.
How does our sense of touch help us in recognising objects?
Answer:
Through touch, we can detect texture, temperature, and shape, helping us identify objects even without seeing them.

Question 19.
What other functions does the tongue serve besides tasting?
Answer:
The tongue aids in chewing, swallowing, and speaking and even helps keep the airway open.

Question 20.
Identify the features of an object that can be understood using each sense.
Answer:
For example, sight helps in colour and shape recognition, touch in texture and temperature, and smell in identif’ing odours.

Question 21.
Name two types of flavours the tongue helps us taste.
Answer:
Salty and Sour.

Question 22.
How do ears help us stay safe in our surroundings?
Answer:
Ears help us stay safe by detecting sounds in our environment, such as alarms or approaching vehicles, which alert us to potential dangers. This ability allows us to respond quickly and stay aware of our surroundings.

Question 23.
Write the functions of the eyes and skin.
Answer:

• The eyes help us see and judge the distance of objects around us.
• The skin protects our body from harm and helps us sense touch, temperature, and pain.

Question 24.
Write the function of the tongue.
Answer:
The tongue helps us taste different flavours and aids in chewing, swallowing, and speaking.

Question 25.
What precautions can we take to protect our eyes from harm?
Answer:

• Wear sunglasses to shield your eyes from LV rays.
• Use protective eye wear during sports or when working with tools.
• Ensure proper lighting when reading or using screens.
• Wash hands before touching your eyes or contacts.

Question 26.
When do you find your sense of smell helpful to you? List some examples. Like to know by its smell that food has gone bad or that something is burning.
Answer:
In addition to detecting bad or burnt objects, we can also sense the fragrance of perfume, the scent of flowers, the smell of sweat; soaps, and detergents.

Magic of Senses Class 6 Notes

Have you ever wondered how you can tell the difference between a hot cup of tea and a cold glass of water? Or how you can recognise your friend’s voice even when you can’t see them? The answer lies in your amazing sense organs.

Our bodies are like wonderful machines with special tools called sense organs. These organs help us to experience the world around us. Just like a camera captures images, our eyes capture light and help us see. Our ears pick up sound waves and help us hear. Our nose detects smells, our tongue tastes different flavours, and our skin feels sensations like hot, cold, soft, and hard.

In this chapter, we will explore these amazing sense organs and learn how they work together to make our World a colourful. sound-tilled, and flavourful place.

Sense Organs

• Creatures have different types of organs that help them to understand their surroundings. These organs are called sense organs.
• Eyes, ears, nose, tongue and skin are the sense organs of human beings.

See and understand

• Eyes capture light and help us see.
• Eye diseases include conjunctivitis, myopia, and hypermetropia.

Hear and understand

• Ears are the sense organs that helps us hearing.
• Loss of hearing occurs due to many reasons. Hearing aids are devices to solve this problem.

Recognising the smell

• Nose is the sense organ that helps us to detect smell.
• We always feel moist inside our nose. The reason for this is the secretion in the nose.

Wow, Such a great taste

• Tongue helps to understand taste.
• Other functions of tongue include chewing and swallowing, speaking, breathing and cleaning the mouth.

Touch and understand

• The skin is the organ that helps us to recognise objects by touch.
• It also helps us to feel sensations like hot and cold.
• The skin is the largest organ in the body.
• Creatures have different types of organs that help them to understand their surroundings. These organs are called sense organs. Eyes, ears, nose, tongue and skin are the sense organs of human beings.
• Eyes help in seeing.
• Eye diseases include conjunctivitis, myopia, and hypermetropia.
• Ears help in hearing.
• Cochlear implant surgery is a surgery to correct congenital hearing loss. This is a surgery to transplant the cochlea inside the ear.

• The nose enables us to smell.
• We always feel moist inside our nose. The reason for this is the secretion in the nose. The function of this secretion is to remove the dust particles and pathogens getting inside the nose. The cold is a condition when this secretion is produced in excess. when there is a virus infection.
• Tongue helps to understand taste.
• Other functions of the tongue include chewing and swallowing, speaking, breathing and cleaning the mouth.
• Skin enables us the feeling of touch.
• The skin is the largest organ in the body.