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NCERT Solutions for Class 5 EVS Chapter 3 - From Tasting to Digesting

Check NCERT Solutions for Class 5 EVS Chapter 3: From Tasting to Digesting. Get detailed and accurate solutions here.

Jun 25, 2019 10:09 IST
NCERT Solutions Class 5 EVS Chapter 3

Get free NCERT solutions for Class 5 EVS Chapter 3 - From Tasting to Digesting. Check the latest and detailed NCERT Solutions for easy understanding of various concepts explained in the NCERT Class 5 EVS Chapter 3.  You will find here the answers for all questions given on each page of this chapter. All these solutions will help to clear all your doubts and and find simple answers to all difficult questions.

NCERT Solutions

Class 5 Environmental Studies (EVS)

Chapter 3: From Tasting to Digesting

NCERT Page No. 23

Discuss and Write

(i) Jhoolan’s mouth started watering when she heard the word imli. When does your mouth water? List five things you like to eat and describe their taste.

(ii) Do you like only one kind of taste or different ones? Why?

(iii) Jhoolan put a few drops of lemon juice in Jhumpa’s mouth. Do you think we can make out the taste with just a few drops?

(iv) If someone were to put a few seeds of saunf (aniseed) on your tongue, would you be able to tell with your eyes closed? How?

(v) How did Jhumpa make out the fried fish? Can you guess the names of certain things only by their smell, without seeing or tasting them? What are these things?

(vi) Has anyone ever told you to hold your nose before taking a medicine? Why do you think they tell you to do this?

Answer.

(i) My mouth starts watering waters on seeing  any of my favourite foods.

Five things which I like to eat are:

Food

Taste

1. Samosa

Spicy

2. Chocolate

Sweet

3. Ice cream

Sweet

4. Pizza

Spicy

5. Jalebi

Sweet

(ii) I like different kinds of tastes because if we will keep eating the foods with similar taste, we will get bored of that taste.

(iii) Yes, a few drops of lemon juice are enough to make out its taste.

(iv) No, I would not be able to tell that the seeds on my tongue are of saunf (aniseed) until I start chewing it. I will be able to recognise the seeds only after tasting them.

(v) Jhumpa made out the fried fish by its smell. There are many food items which we can make out by their smell only. Some of them are: Orange, omelette, onion, coffee, halwa, samosa, etc.

(vi) Nose is used to smell the things that gives us an idea of the taste of a food. Now holding our nose can help us to avoid the bad smell of medicine and take it with a little less discomfort.

NCERT Page No. 24

Close Your Eyes and Tell

Collect a few food items having different kinds of taste. Play a game with your friends like Jhumpa and Jhoolan did. Tell your friend to taste the food and ask–

(i) How did it taste? What was the food item?

(ii) On which part of the tongue could you get the most taste – in front, at the back, on the left or right side of the tongue?

(iii) Which taste could be made out on which part of the tongue? Mark these parts on the picture given.

(iv) One at a time put some things to eat in other parts of your mouth – under the tongue, on the lips, on the roof of the mouth. Did you get any taste there?

Answer.

This activity is to make students aware of different kinds of tastes and sensations they come across in their daily life. So, each student must write the answers for these questions as per their own choice of food and the kind of taste they felt. We are writing an answer for reference only.

Suppose we had three different foods: Salt, Sugar and Orange. Then answers for above questions will be as follows:

(i) Taste and names of food items as told by my friend:

Taste

Food Item

Salty

Salt

Sweet

Sugar

Sweet and Sour

Orange

(ii) I can get the most taste in the front part of my tongue.

(iii) Different parts of tongue have different taste zones.

  • Front part of tongue recognises sweet taste.
  • Sides of tongue recognise sour and salty taste.
  • Back part of tongue recognises bitter taste

The following figure shows a tongue marked with different taste regions:

 

(iv) No, we would not get any taste in other portion of mouth like under the tongue, on the lips or on the roof of the mouth. This is because these parts do not have any taste buds.

NCERT Page No. 25

1. Use a clean cloth to wipe the front part of your tongue so that it is dry. Put some sugar or jiggery there. Could you taste anything? Why did this happened.

2. Stand in front of a mirror and look closely at your tongue. How does the surface look? Can you see any tiny bumps on the surface?

Answer. 

1. No, I could not taste anything. This is because we get the taste of anything only when it mixes up with saliva on the tongue and reaches the taste buds present on the tongue.

2. The surface of our longue looks a little rough. Yes, I can see tiny bumps on the surface of my tongue.

Tell

(i) If someone asks you to describe the taste of amla or cucumber, you might find it difficult to explain. How would you describe the taste of these – tomato, onion, saunf, garlic. Think of words that you know or make up your own words to describe the taste.

(ii) When Jhumpa tasted some of the things, she said “Sssee, sssee, sssee…” What do you think she may have eaten?

(iii) Why don’t you make sounds that describe some tastes? From your expressions and sounds ask your friends to guess what you might have eaten?

Answer.

(i) Taste of given food items can be described as follows:

Food Item

Taste

Tomato

Sweet, sour and juicy

Onion

Pungent

Saunf

Sweet

Garlic

Bitter and pungent

(ii) Jhumpa might have eaten chillies or something hot and spicy.

(iii) We can make following expressions and sounds for different tastes:

Expressions and Sounds

Food Items

Slurping

Soup, Coffee, Noodles

Yum

Ice Cream, Chocolate shake, Jalebi

NCERT Page No. 26

Discuss

(i) Has anyone at home told you to eat slowly and to chew well so that the food digests properly? Why do you think they say this?

(ii) Imagine you are eating something hard like a green guava. What kinds of changes take place in it – from the time you bite a piece and put it in your mouth to when you swallow it?

(iii) Think what does the saliva in our mouth do?

Answer.

(i) Yes, my mother often advices me to eat slowly and to chew well. I think proper chewing helps to moisten the food which enables its easy swallowing and also start its partial digestion in mouth itself.

(ii) When I start chewing the hard guava it tastes somewhat bitter in starting. When I chew it more it starts breaking into smaller pieces and becomes soft and sweet.

(iii) Saliva in our mouth makes food soft and easy to swallow. Also it helps in the initial digestion of food in mouth.

NCERT Page No. 27

Straight from the Heart

Discuss

(i) How do you feel when you are very hungry? How would you describe it? For example, sometimes we jokingly say, “I am so hungry I could eat an elephant!”

(ii) How do you come to know that you are hungry?

(iii) Think what would happen if you do not eat anything for two days?

(iv) Would you be able to manage without drinking water for two days? Where do you think the water that we drink goes?

Answer.

(i) When I am hungry I feel uncomfortable sensations in my stomach and at that time I am unable to concentrate on my any work or studies. I also feel tired and drained out of energy.

(ii) When I get a strong urge to eat something, I come to know that I am hungry.

(iii) If I do not eat anything for two days, I will feel completely exhausted and irritated. I may even fall ill.

(iv) No, I will not be able to manage without water for two days. I think the water we drink is used by our body for various metabolic functions. Excess water is excreted out of the body in the form of urine and sweat.

NCERT Page No. 28

Talk and Discuss

Do you remember that in Class IV you made a solution of sugar and salt? Nitu’s father also made this and gave her. Why do you think this is given to someone who has vomiting and loose motions?

(i) Have you heard the word ‘glucose’, or seen it written anywhere? Where?

(ii) Have you ever tasted glucose? How does it taste? Tell your friends.

(iii) Have you or anyone in your family been given a glucose drip? When and why? Tell the class about it.

(iv) Nitu’s teacher used to tell the girls to have glucose while playing hockey. Why do you think she did this?

(v) Look at Nitu’s picture and describe what is happening. How is the glucose drip being given?

Answer.

When someone has vomiting and loose motions then the quantity of water, salt and sugar decreases in his body. So, the solution of sugar and salt is given to the affected person to replenish this loss in his body.

(i) Yes, I have heard the word glucose and have seen it written on the packets of glucose powder. We have a packet of glucose powder at our home.  

(ii) Yes, I have tasted glucose. It tastes sweet.

(iii) Yes, once my sister had frequent vomiting and lose motions. She could not digest any food and got very weak. Then she was taken to the doctor. The doctor said that her stomach was upset. Then he gave her the glucose drip. He said that it would help her to recover quickly.

(iv) When we play, we get a lot of sweating which results in loss of water, sugar and salt from the body. Due to this we lose a lot of energy. Glucose solution provides us instant energy by replenishing the lost water and sugar. That is why Nitu’s teacher used to tell the girls to have glucose while they were playing hockey.

(v) The picture shows that glucose drip is being given to Nitu. The glucose solution is taken in a bottle which is hanging in a stand. From here glucose is being injected into Nitu’s body drop by drop with the help of a tube and a needle.

NCERT Page No. 31

Think and Discuss

Imagine if you had been in place of Dr. Beaumont, what experiments would you have done to find out the secrets of our stomach? Write about your experiments.

Answer.

If I were in place of Dr. Beaumont, I would have done experiments with chapatti, Cucumber and khichdi. I would have taken out some digestive juices from Martin’s stomach and added equal quantities of these juices in equal quantities of three foods taken. I would have checked for the time it took to digest each food.

NCERT Page No. 33

Discuss

(i) Why do you think Rashmi could eat only one roti in the whole day?

(ii) Do you think Kailash would like games and sports?

(iii) What do you understand by ‘proper’ food?

(iv) Why do you think that the food of Rashmi and Kailash was not proper?

Answer.

(i) Rashmi is too poor to afford proper meal in a day. That is why she could eat only one roti in the whole day.

(ii) No, I think Kailash would not like games and sports because his fat and flabby body shows that he never does any physical activity

(iii) Proper food is one which contains adequate amount of food with all nutritious elements as per the body requirement of a person.

(iv) Rashmi is not getting enough food due to poverty whereas Kailash is more dependent on junk food which has no nutritious values.

Find Out

Talk with your grandparents or elderly people and find out what they ate and what work they did when they were of your age. Now think about yourself – your daily activities and daily diet. Are these similar or different from what your grandparents did and ate?

Answer.

My grandparents used to eat dal, rice, green vegetables, roti, milk and fruits. They used to do a lot more physical activities and hard work than what we do today. They used to go to school miles away from their home by cycle or walking. They also used to help their parents in their daily work like working in fields, kitchen, taking care of cattle, etc. But today, our daily activities and diet are far different from our grandparents. We do eat rice, dal and vegetables, but we also take a lot of junk food like chips, burger, pizzas and soft drinks. We do very less physical work. We go to school by bus.  We prefer sitting on sofa and spend most of our time in watching TV and playing games on mobile phones.

NCERT Page No. 34

Think and Discuss

(i) Do you know any child who does not get enough to eat in the whole day? What are the reasons for this?

(ii) Have you ever seen a godown where a lot of grain has been stored? Where?

Answer.

(i) Yes, I know of some children who do not get enough to eat in the whole day. They belong to poor families who live in a nearby slum. They are too poor to afford a proper meal in a day.

(ii) Yes, I have seen a godown where a lot of grain has been stored. It is in the nearby anaj mandi.

What we have learnt

(i) Why can you not taste food properly when we have a cold?

(ii) If we were to say that “digestion begins in the mouth”, how would you explain this. Write.

Answer.

(i) We are not able to taste food properly when we have a cold because the senses of smell and taste are very closely connected and help us in getting the complete taste of a food. Since our nose gets blocked when we have cold so we are not able to smell and taste food properly.

(ii) It is said that digestion starts in the mouth because the saliva contains digestive enzymes. These enzymes help in digestion of the sugars by breaking them into simpler molecules. Thus we can say that digestion begins in the mouth.

You may also check the NCERT solutions for other chapters of class 5 EVS form the following links:

NCERT Solutions for Class 5 EVS Chapter 1 - Super Senses

NCERT Solutions for Class 5 EVS Chapter 2 - A Snake Charmer’s Story

NCERT solutions for remaining chapters will be made available very soon. Check here for the best updated answers to all the NCERT questions and make your exam preparations an easy process.

Also Check NECRT Books for Class 5

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NCERT Book for Class 5 EVS

NCERT Book for Class 5 Maths

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NCERT Solutions for Class 5 Maths