NCERT Solutions for Chapter 3 From Tasting to Digesting Class 5 EVS
Short Notes for Class 5 EVS Chapter 3 From Tasting to Digesting
Only our mouths are involved in the digestion process. Our tongue helps us taste different foods. Our taste buds are overwhelmed by bitterness, spice, sweetness, sourness, and saltiness. Sweet, salty, sour, and bitter flavors are detected by our taste buds on our tongue. It is critical to note that digestion refers to the process of breaking down food into energy. Saliva in the mouth softens the food, and taste receptors on the tongue taste the food. As soon as food enters the mouth, taste receptors in the tongue begin to detect the taste.
Chapter Name | From Tasting to Digesting NCERT Solutions |
Class | CBSE Class 5 |
Textbook Name | EVS |
Related Readings |
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Page No 23:
Question Discuss and Write:
Question 1: 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.
Answer:
My mouth waters on seeing, smelling, hearing or even thinking of the food items I like to eat.
Five things that I like to eat and their respective tastes are:
|
SI. No. |
Food |
Taste |
|
1. |
Pickle |
Sour |
|
2. |
Ice cream |
Sweet |
|
3. |
Potato chips |
Salty |
|
4. |
Chocolates |
Sweet |
|
5. |
Banana shake |
Sweet |
Disclaimer: The second part of the question aims to encourage children to be creative and explore their vocabulary in describing different kinds of tastes. The answer for the same is based upon a student's own observation. Hence, it can vary from various students.
Question 2: Do you like only one kind of taste or different ones? Why?
Answer:
We like different kinds of tastes. This is because if we keep eating food with similar taste, we will get bored of that taste very soon. Moreover, to stay healthy we need a diet with proper quantity of all kinds of food that have different tastes.
Question 3: 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?
Answer:
Yes, I think we can make out the taste of lemon juice with just a few drops of it. This is because lemon juice is very sour and our tongue has tiny bump-like structures that can recognise the taste of even a few drops of lemon juice.
Question 4: 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?
Answer:
We will not be able to judge that it is saunf (aniseed) until we start chewing it. Once we start chewing it, it starts getting mixed with the saliva present in the mouth. We are then able to recognise its sweet taste.
Question 5: 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?
Answer:
Jhumpa might have made out the fried fish by its smell. There are several other things we can make out using their smell. Few of them are
(i) Halwa
(ii) Coffee
(iii) Jackfruit
(iv) Orange
(v)Sambar
Disclaimer: The second part of the question aims to develop imagination and recognition skills of the students. The answer for the same can vary from one student to another.
Question 6: Has anyone ever told you to hold your nose before taking a medicine? Why do you think they tell you to do this?
Answer:
Nose is a sense organ of smell. Holding the nose while taking medicines enables us to take in the medicine without sensing its bad smell. The two senses, smell and taste are closely related. Hence, on blocking the nose we are able to neither smell nor taste the medicine properly.
Page No 24:
Question Close Your Eyes and: 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-
Question 1: How did it taste? What was the food item?
Answer:
Chocolates were taken as food. There was a sweet taste to them.
Question 2: 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?
Answer:
Towards the front. Since it is placed on the tongue first.
Question 3:Which taste could be made out on which part of the tongue? Mark these parts on the
|
Taste |
Region of the tongue |
|
Front |
Sweet |
|
Side |
Sour and salty |
|
Back |
Bitter |
Answer:
Portion of mouth under the tongue, on the lips, and hard parts such as the roof of the mouth and teeth do not sense any kind of taste as they do not have any taste bud.
Page No 25:
Question Tell:
Question 1: 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.
Answer:
|
Food item |
Taste |
|
Tomato |
Sweet and tangy |
|
Onion |
Tangy and hot |
|
Saunf |
Sweet |
|
Garlic |
Sharp or hot |
Question 2: When Jhumpa tasted some of the things, she said "Sssee, sssee, sssee..." What do you think she may have eaten?
Answer:
humpa might have eaten chillies or something hot and spicy which made her to sound "Ssseee, sssee, sssee..."
Question 3: 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:
Disclaimer: The purpose of this question is to make the students participate in day-to-day activities, based upon which they can derive logical conclusions. Keeping the process of participation in mind, the answer to this question has not been provided.
Page No 26:
Question Discuss:
Question 1: 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?
Answer:
Yes, parents usually advice their kids to eat slowly and to chew well so that the food digests properly.
The process of chewing breaks down larger food particles into smaller ones. This has two advantages:
(i) Moistening of food that enables its easy swallowing
(ii) The process of chewing initiates the process of digestion in the mouth
Question 2: 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? Think what does the saliva in our mouth do?
Answer:
As we bite a substance such as the green guava, we take in a small piece of that substance in our mouth. Inside the mouth it starts mixing with the saliva. Now, as we start chewing it, it gets more and more mixed up with the saliva. In this manner, the process of digestion begins in the mouth. This saliva mixed with the food substance is also easy to swallow.
Page No 27:
Question Discuss:
Question 1: 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 cat an elephant!"
Answer:
When we are hungry we feel empty in our stomach. The walls of our stomach give us a feeling as if they get collapsed. Our stomach and intestine start making noises as if they are demanding food.
Disclaimer: This question aims to encourage children to be creative and explore their vocabulary in describing different signs of hunger. The answer for the same can vary among students.
Question 2: How do you come to know that you are hungry?
Answer:
When I am hungry my stomach starts making noises. Other signs of hunger that I get are:
(i) Desire to eat food
(ii) Anger and irritation
(iii) Feeling tired and drained out of energy
Disclaimer: This question aims to encourage children to be creative and explore their vocabulary in describing different signs of hunger. The answer for the same can vary from one student to another.
Question 3: Think what would happen if you do not eat anything for two days?
Answer:
If we do not eat anything for two days, we will start feeling tired, drained out, angry and irritated. We would not be able to concentrate on any physical or mental activity. We may also fall ill.
Question 4: Would you be able to manage without drinking water for two days? Where do you think the water that we drink goes?
Answer:
It would be very difficult for me to stay without water for two days. The water we drink goes to food pipe and then to the stomach, in the same way as food moves in our body. Excess of water is expelled out of the body in the form of urine.
Page No 28:
Question Talk and Discuss:
Question 1: 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?
Answer:
Whenever someone suffers from vomiting and loose motions, sugar and salt are given to prevent further dehydration.
Question 2: Have you heard the word 'glucose', or seen it written anywhere? Where?
Answer:
In television ads and on glucose packets, the word 'glucose' appears.
Question 3: Have you ever tasted glucose? How does it taste? Tell your friends.
Answer:
Glucose is a very sweet substance, and I have tasted it.
Question 4: Have you or anyone in your family been given a glucose drip? When and why? Tell the class about it.
Answer:
My family member was given glucose drips when hospitalized for sicknessTo speed up their recovery, they were advised to take glucose.
Question 5: Nitu's teacher used to tell the girls to have glucose while playing hockey. Why do you think she did this?
Answer:
The teacher told Nitu's class to take glucose while playing hockey because it would boost their energy levels.
Question 6: Look at Nitu's picture and describe what is happening. How is the glucose drip being given?
Answer:
Disclaimer: The purpose of this section is to make the students participate in day-to-day activities, based upon which they can make logical deductions. Keeping the importance of this process in mind, it is strongly recommended that the students prepare the solutions on their own.
Page No 31:
Question 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:
Disclaimer: The purpose of this section is to introduce the children to the method of science and the passion with which the scientists pursue their experiments. This involves certain prior imagination followed by experimentation and logical deductions. Keeping the process of imagination and experimentation in mind, it is strongly recommended that the students prepare the solutions on their own.
Page No 33: Question Discuss:
Question 1:Why do you think Rashmi could eat only one roti in the whole day?
Answer:
In a whole day, Rashmi could eat only one roti since she came from a poor family and could not afford to buy food. There was only one roti for her.
Question 1: Do you think Kailash would like games and sports?
Answer:
Sports and games aren't Kailash's thing. Physical activity does not interest him, as he has a fat and flabby body.
Question 1: What do you understand by 'proper' food?
Answer:
Nutritional foods and proteins are essential for the body's proper function, so a healthy diet includes them.
Question 1: Why do you think that the food of Rashmi and Kailash was not proper?
Answer:
Kailash eats junk food, which is harmful to his body, while Rashmi does not receive enough nutrition. Therefore, we can conclude that his food intake is unbalanced.
Question 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:
Disclaimer: The purpose of this section is to make the students interact actively with the people around them and their surroundings. The process calls for critical observance based upon which they can draw certain conclusions. Considering the sustenance of this process of interaction the answer to this question has not been provided.
Page No 34:
Question Think and Discuss:
Question 1: Do you know any child who does not get enough to eat in the whole day? What are the reasons for this?
Answer:
There are a few children I know who do not have enough food to eat for the entire day. Families from poor backgrounds cannot afford to feed them properly.
Question 2: Have you ever seen a go down where a lot of grain has been stored? Where?
Answer:
In a market, I saw a godown where grains are stored.
Question What we have learnt:
Question 1: Why can you not taste food properly when we have a cold?
Answer:
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 since our nose gets blocked when we have cold we are not able to smell and taste food.
Question 2: If we were to say that "digestion begins in the mouth", how would you explain this. Write.
Answer:
It is said that digestion starts in the mouth because the saliva present in the mouth helps to breakdown the food into smaller units and it also helps in digesting the sugars present in food.