If you are looking for DAV Class 4 Science Chapter 7 Question Answer Food of My Living World science book, then you are at the right place. Here at NCERTBooksPDF, Class 4 Science Chapter 7 exercises are solved with accurate, child-friendly explanations, clear nutritional tables, and complete solutions to help DAV students score top marks in their exams.
Table of Contents
- DAV Class 4 Science Chapter 7 Food Solutions
- A. Fill in the Blanks
- B. Write True or False (With Explanations)
- C. Tick the Correct Option
- D. Answer the Following Questions in Brief
- E. Answer the Following Questions (Detailed Explanations)
- Value-Based Questions
- Something to Do
DAV Class 4 Science Chapter 7 Food Solutions
DAV Class 4 Science Chapter 7 Food explains essential nutrients (carbohydrates, fats, proteins, vitamins, minerals), balanced diet, dietary roughage, water importance, and age-wise nutritional requirements. Below are the complete textbook solutions.
A. Fill in the blanks.
1. Carbohydrates and fats are the nutrients which provide energy to our body.
2. Foodstuffs, containing proteins, are called body-building foods.
3. Amla (or lemon) and orange are sources of Vitamin C.
4. We can get iodine from iodised table salt.
5. The roughage in our diet, helps the body to get rid of undigested food.
Answer: (1) energy | (2) proteins | (3) Amla, orange | (4) iodine | (5) undigested
B. Write True or False for the following statements.
1. All nutrients are important for our body.
Answer: True
Reason: Every nutrient performs distinct and vital roles like energy production, tissue repair, or disease defense.
2. Our food should include more than one source of protein.
Answer: True
Reason: Different protein foods (pulses, milk, nuts, eggs) supply different essential amino acids required for balanced growth.
3. Our body needs Vitamin C for healthy bones and teeth.
Answer: False
Reason: Our body requires Vitamin D and calcium for healthy bones and teeth; Vitamin C keeps gums and skin healthy.
4. A balanced diet need not contain all the nutrients.
Answer: False
Reason: A balanced diet must contain all five nutrients in appropriate proportions along with roughage and water.
5. Old people, who are not very active, should eat more of fats and carbohydrates.
Answer: False
Reason: Inactive old people have a lower metabolic rate and expend less energy; eating excessive fats and carbs can lead to obesity and heart issues.
C. Tick (✓) the correct option.
1. Calcium, Iron and Phosphorus are examples of—
(a) minerals
(b) vitamins
(c) proteins
(d) carbohydrates
Answer: (a) minerals
Explanation: Calcium, iron, and phosphorus are vital inorganic mineral nutrients needed in small amounts.
2. Protective foods are needed by our body for—
(a) energy
(b) warmth
(c) health
(d) growth
Answer: (c) health
Explanation: Protective foods (vitamins and minerals) guard against diseases and maintain good health and resistance.
3. A person, doing a lot of physical work, needs more of—
(a) vitamins
(b) minerals
(c) proteins
(d) carbohydrates
Answer: (d) carbohydrates
Explanation: Carbohydrates are primary energy-giving foods that provide instant stamina for heavy physical manual work.
4. Sugar contains mainly—
(a) carbohydrates
(b) vitamins
(c) minerals
(d) fats
Answer: (a) carbohydrates
Explanation: Refined sugar is composed almost entirely of simple carbohydrates.
5. The vitamin, that helps us to have good eye-sight, is Vitamin—
(a) A
(b) B
(c) C
(d) D
Answer: (a) A
Explanation: Vitamin A (found in carrots, papaya, milk, and spinach) is essential for sharp eyesight and healthy retinas.
D. Answer the following questions in brief.
1. Name the nutrients present in energy giving foods.
Answer: Carbohydrates and Fats.
2. State the main role of proteins for our body.
Answer: Proteins help our body to grow, build muscle mass, and repair damaged cells and healing tissues.
3. Name two food items, obtained from animals, that are good sources of proteins.
Answer: Milk and Eggs (or fish, meat, paneer).
4. Name two minerals that are required for healthy bones and teeth. Also mention one food source that contains both of them.
Answer:
– Two minerals: Calcium and Phosphorus.
– Food source containing both: Milk (or curd, paneer).
5. Why are vitamins and minerals called ‘protective foods’?
Answer: Vitamins and minerals protect our body from infections, illnesses, and deficiency diseases, and help maintain healthy eyes, skin, gums, and teeth.
E. Answer the following questions.
1. What are nutrients? Why are they necessary for our body?
Answer: Nutrients are essential nourishing substances present in food (carbohydrates, proteins, fats, vitamins, and minerals). They are necessary because they supply energy for daily work, construct new cells for physical growth, repair damaged body parts, and safeguard us against diseases.
2. Why should we eat a balanced diet?
Answer: A balanced diet contains all essential nutrients in proper, balanced proportions along with sufficient water and dietary fiber (roughage). Eating a balanced diet prevents malnutrition, keeps our immune defense strong, maintains healthy weight, and ensures all body organs function optimally.
3. Why is it advisable to eat food items like whole fruits, salads and whole grains?
Answer: Whole fruits, fresh raw salads, and whole grains contain high amounts of dietary fiber or roughage. Although roughage provides no direct energy, it adds necessary bulk to food, aids the smooth movement of food through intestines, and assists the body in expelling undigested solid wastes, thereby preventing constipation.
4. Why do we say that water is essential for proper functioning of our body?
Answer: Water is indispensable to human life because:
- It dissolves and helps absorb digested nutrients into the bloodstream.
- It regulates and cools body temperature through sweating.
- It flushes out toxic liquid metabolic wastes from the body in the form of urine and sweat.
- It forms the major liquid component of blood and digestive juices.
5. ‘Old people need less of proteins, carbohydrates and fats than young children.’ Justify this statement.
Answer: Young growing children are in an active phase of body growth, development, and athletic play, which requires large amounts of protein for muscle synthesis and carbohydrates/fats for physical energy. In contrast, older adults have ceased physical growth, have a significantly lower metabolic rate, and lead a less strenuous lifestyle. Therefore, their bodies demand fewer calories, proteins, and fats.
Value-Based Questions
Raman went to a family birthday party. He refused to eat the wholesome home-cooked dinner consisting of dal, rice, seasonal vegetables, and fresh salad that was served. He threw a tantrum demanding pizzas and burgers, making his parents feel embarrassed and uncomfortable in front of the guests.
1. Was Raman right in not eating anything at the party?
Answer: No, Raman was completely wrong. Being fussy and refusing nourishing food served with love shows poor etiquette, stubbornness, and disrespect towards hosts.
2. Why did Raman’s parents feel bad at his behaviour?
Answer: Raman’s parents felt embarrassed because creating a scene in public displayed undisciplined behavior, lack of gratitude, and an unhealthy addiction to fast food.
3. Which is a better food—dal and salad or pizza and burger?
Answer: Dal and salad is far superior because dal provides high-quality proteins and minerals, and salad provides essential vitamins and roughage. In contrast, pizza and burger contain refined flour (maida), excess unhealthy cheese/trans fats, and artificial additives that lead to obesity and lethargy.
4. What would you do if you were in Raman’s place? Discuss.
Answer: If I were in Raman’s place, I would eat the meal served gracefully, appreciate the food, thank the hosts, and understand that fast foods like burgers are only occasional treats, not staple daily meals.
Something to Do
1. Vitamin Food Chart: Match common food items with their primary vitamins: Carrot/Papaya (Vitamin A), Whole grains/Milk (Vitamin B), Lemon/Amla/Orange (Vitamin C), Sunlight/Egg yolk/Milk (Vitamin D).
2. Balanced Lunchbox Planner: Plan a weekly school tiffin that contains all five essential nutrients (e.g., vegetable paratha, sprouted moong salad, boiled egg/paneer roll, and fresh apple slices).
Related Chapters:
- DAV Class 4 Science Solutions (All Chapters)
- DAV Class 4 Science Chapter 6 Insects
- DAV Class 4 Science Chapter 8 Water Scarcity
🎉 Chapter 7 Completed!
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