CBSE Important Questions Class 6 Science Chapter 3 – Mindful Eating: A Path to a Healthy Body
Class 6 Science Chapter 3 Mindful Eating: A Path to a Healthy Body is part of the new NCERT textbook Curiosity. It teaches students about the different components of food, called nutrients: carbohydrates, fats, proteins, vitamins, minerals, roughage and water. Students learn which foods give energy, which help the body grow, and which protect us from disease. They also learn simple tests for starch, protein and fat, and what happens when a nutrient is missing from the diet, such as anaemia, rickets, night blindness and constipation.
These CBSE important questions for Class 6 Science Chapter 3 cover the steps of the protein test, energy-giving foods, the food pyramid and the role of fats, deficiency diseases caused by a lack of roughage, vitamin A and vitamin D, why sportspersons need protein, and reading a food composition table. Every question has a clear step-by-step answer in simple English, so students can practise on their own, parents can check the working, and teachers can use them for class tests. A free printable PDF of these important questions is also available on this page.
Q1. Given below are the steps to test the presence of proteins in a food item:
(i) Take a small quantity of the food item in a test tube, add 10 drops of water to it and shake it.
(ii) Make a paste or powder of the food to be tested.
(iii) Add 10 drops of caustic soda solution to the test tube and shake well.
(iv) Add 2 drops of copper sulphate solution to it.
Which of the following is the correct sequence of the steps?
(a) (i), (ii), (iv), (iii)
(b) (ii), (i), (iv), (iii)
(c) (ii), (i), (iii), (iv)
(d) (iv), (ii), (i), (iii)
Answer: (b) (ii), (i), (iv), (iii)
First make a paste or powder of the food (ii). Then put a little of it in a test tube with 10 drops of water and shake (i). Next add 2 drops of copper sulphate solution (iv), and finally add 10 drops of caustic soda solution and shake well (iii). A violet colour shows that protein is present.
Q2. Read the food items given below:
(i) Wheat
(ii) Ghee
(iii) Iodised salt
(iv) Spinach (palak)
Which of the above food items are "energy-giving foods"?
(a) (i) and (iv)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)
Answer: (c) (i) and (ii)
Energy-giving foods are those rich in carbohydrates and fats. Wheat is rich in carbohydrates and ghee is a fat, so both give energy. Iodised salt gives the mineral iodine and spinach gives vitamins and minerals, which are protective foods.
Q3. Which of the following nutrients is not present in milk?
(a) Protein
(b) Vitamin C
(c) Calcium
(d) Vitamin D
Answer: (b) Vitamin C
Milk is a good source of protein, calcium and vitamin D, but it has almost no vitamin C. Vitamin C comes from citrus fruits such as orange and lemon, and from amla and green vegetables.
Q4. The image given below shows a food pyramid, which shows the proportion in which different food items must be consumed.
(a) Based on the given image, the proportion of which food component must be minimum in our diet?
(b) State any two roles of this food component.
(c) What will happen if its consumption exceeds the normal limits?
(d) Name two plant and two animal sources of this food component.
Answer: (a) The top of the pyramid is the smallest, so fats (and sugary foods) must be eaten in the minimum amount.
(b) Roles of fats: 1. They give us energy. 2. They help the body absorb some vitamins. 3. They form a layer under the skin that keeps the body warm.
(c) If we eat too much fat, the extra fat gets stored in the body and can lead to obesity (being overweight).
(d) Plant sources of fat: groundnuts, mustard oil, avocado. Animal sources of fat: butter, ghee, egg yolk.
Q5. Mary often skips her school due to stomach ache. She consumes a diet consisting of all food components except fruits and certain leafy vegetables.
(a) Which health condition is she most likely suffering from?
(b) Does the absence of fruits and certain leafy vegetables play any role in this health condition?
(c) Name some food items that she must include in her diet every day.
Answer: (a) Mary is most likely suffering from constipation.
(b) Yes. Fruits and leafy vegetables are rich in roughage (dietary fibre). Roughage adds bulk to the undigested food and helps the stool pass out smoothly. Without it, constipation can occur. This is why we are advised to eat salads and whole grains.
(c) She should eat foods such as banana, apple, spinach, oats, whole wheat and lentils every day.
Q6. Nia complained of itchy and dry skin. On medical examination, she also stated that she is sometimes unable to see properly in dim light.
(a) Identify the food component which is lacking in her body.
(b) Mention the food items the doctor would prescribe to overcome this deficiency.
(c) Which condition could she suffer from due to prolonged deficiency of this food component?
Answer: (a) Nia's body is lacking vitamin A.
(b) The doctor would advise foods rich in vitamin A, such as carrot, milk, papaya, mango and green leafy vegetables.
(c) A long shortage of vitamin A can cause night blindness and may finally lead to loss of vision.
Q7. State whether the given statements are true or false. If false, write the correct statement without changing the first word.
(a) Anaemia is an infectious disease.
(b) Cereals are body-building foods.
Answer: (a) False. Anaemia is a deficiency disease, caused by a lack of iron in the diet.
(b) False. Cereals are energy-giving foods, because they are rich in carbohydrates.
Q8. Protein is often considered a favourite food of sportspersons. Give a reason and name some plant-based protein sources.
Answer: Proteins are body-building foods. They help muscles grow and repair, which is very important for sportspersons, so protein-rich food is their favourite.
Plant-based sources of protein are pulses (dal), beans, gram (chana), soyabean, peas and nuts such as almonds.
Q9. Which of the following is most likely to happen if someone takes a diet very low in carbohydrates and fats?
(a) The person will have a higher risk of vitamin deficiency.
(b) The person might experience frequent fatigue and lack of energy.
(c) The person will have increased body temperature regulation issues.
(d) The person will have enhanced muscle growth and strength.
Answer: (b) The person might experience frequent fatigue and lack of energy.
Carbohydrates and fats are the main energy-giving nutrients, like fuel for a vehicle. If a diet has very little of them, the body does not get enough energy, and the person feels tired and weak most of the time.
Q10. A nutritionist is analysing the diet of two marathon runners to determine who has a better energy supply during their races. Runner A consumes a diet high in carbohydrates (70% of daily intake) from sources like rice, bananas and sweet potatoes, while Runner B consumes a diet with moderate carbohydrates (40% of daily intake) but higher in fats (30% of daily intake) from sources like nuts, ghee and coconut. Based on their diets, which of the following is the most accurate analysis?
(a) Runner A gets quick energy but may get tired later.
(b) Runner B will crash due to low carbs and fats.
(c) Runner A will get tired in the beginning only due to low fats.
(d) Runner B will get a quick energy boost which will become steady with the race.
Answer: (a) Runner A gets quick energy but may get tired later.
Carbohydrates are quick fuel. Runner A's high-carbohydrate diet gives fast energy at the start, but this energy is used up quickly, so Runner A may feel tired later in a long race. Fats release energy slowly over a long time, so Runner B's energy comes more steadily.
Q11. Alice kept some sweets on tissue paper, which made the paper translucent after some time. This observation indicates the presence of which of the following components of food in the sweets?
(a) Carbohydrates
(b) Fats
(c) Vitamin A
(d) Vitamin D
Answer: (b) Fats
When a food containing fat is kept on paper, the fat soaks into the paper and leaves an oily patch through which light can pass. This translucent (see-through) patch is the simple test for the presence of fats.
Q12. The given table shows the composition and energy content of some common food items. Which food item would be best for the prevention of rickets?
| Food | Energy content (kJ/100 g) | Protein (g) | Fat (g) | Carbohydrate (g) | Vitamin A (mg) | Vitamin D (mg) |
|---|---|---|---|---|---|---|
| A | 3400 | 0.5 | 80 | 0 | 0 | 40 |
| B | 160 | 1.3 | 0.5 | 7 | 200 | 0 |
| C | 420 | 1.0 | 2 | 26 | 10 | 0 |
| D | 1100 | 7.0 | 1.5 | 62 | 0 | 0 |
(a) A
(b) B
(c) C
(d) D
Answer: (a) A
Rickets is a disease in which the bones become soft and weak. It is caused by a lack of vitamin D, which helps the body use calcium. In the table, only food A contains vitamin D (40 mg per 100 g), so food A is the best choice to prevent rickets.
Related Study Material on Extramarks
- CBSE Important Questions Class 6 Science Chapter 1
- CBSE Important Questions Class 6 Science Chapter 2
- CBSE Important Questions Class 6 Science Chapter 4
- CBSE Important Questions Class 6 Science Chapter 5
- CBSE Important Questions Class 6 Science Chapter 6
- CBSE Important Questions Class 6 Science Chapter 7
- CBSE Important Questions Class 6 Science Chapter 8
- CBSE Important Questions Class 6 Science Chapter 9
- CBSE Important Questions Class 6 Science Chapter 10
- CBSE Important Questions Class 6 Science Chapter 11
- CBSE Important Questions Class 6 Science Chapter 12
Q.1 What is the difference between ginning and spinning of cotton?
Marks:2
Ans
Difference between ginning and spinning of cotton:
| Ginning | Spinning |
|
1. It is the process of making cotton yarn from fibres. |
|
|
Q.2 In the question, a statement of Assertion (A) followed by statement of Reason (R) is given. Choose the correct option out of the choices given below the question.
Assertion (A): Cotton is planted early in the spring.
Reason (R): Black soil is excellent for the cultivation of cotton.
(i) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(ii)Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(iii)(A) is true but (R) is false.
(iv) (A) is false but (R) is true.
Marks:1
Ans
Cotton is planted early in the spring because cotton plants need a warm climate. Black soil is excellent for the cultivation of cotton. The climatic conditions required to grow cotton are not related to the type of soil.