DAV Class 3 Science Chapter 8 Food solutions from DAV textbook My Living World. Here you will find clear answers on food sources (plants vs animals), parts of plants eaten as food, balanced diet, and food needs of different age groups with authentic DAV illustrations.
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Chapter Overview: Food (Class 3 Science)
Food is the basic fuel of our life. It gives us energy to play and study, helps our body grow taller and stronger, and protects us from falling sick. We obtain food from two primary sources: plants and animals.
Warm-Up Activity (Book Page 59): Fill in the Blanks
Question: Fill in the following blanks with the help of the Help Box (Help Box: cheese, grains, curd, live, grow, almonds, walnuts):
Answer:
- We eat food to live and grow.
- Flour is obtained from grains of wheat plant.
- Almonds and walnuts are used as dry fruits in winters.
- Curd and cheese are made from milk.
A. Fill in the blanks.
1. We like munching nuts / peanuts in winters.
Explanation: Dry nuts give warmth and healthy oils to keep the body energized during cold months.
2. Mint gives flavour / aroma to our food.
Explanation: Mint leaves add a refreshing scent and taste to chutneys, curries, and beverages.
3. Spinach / Cabbage is a green vegetable.
Explanation: Green vegetables are rich sources of dietary iron, calcium, and vitamins.
4. Potato is an underground stem.
Explanation: Potato grows below the soil surface as a swollen stem (tuber) storing starch.
5. Carrot is a root, it can be eaten raw.
Explanation: Carrots are crunchy taproots that can be washed and eaten directly in salads.
B. Match the following:
Verified matching table for plant parts eaten as food:
| Edible Plant Part | Examples from Textbook | Nutritional Value |
|---|---|---|
| 1. Root | Carrot, Radish, Beetroot, Turnip | Rich in vitamin A, minerals, and dietary roughage |
| 2. Stem | Potato, Ginger, Sugarcane | Rich in energy-giving starch and natural sugars |
| 3. Leaf | Spinach, Mint, Coriander, Cabbage | Rich in iron, calcium, and protective vitamins |
| 4. Seed | Wheat, Rice, Maize, Gram, Peas | Rich in carbohydrates and body-building proteins |
| 5. Fruit | Mango, Apple, Tomato, Brinjal | Rich in vitamins, water, and immunity boosters |
C. Tick the correct option.
1. We eat the seeds of—
(a) wheat
(b) potato
(c) carrot
(d) spinach
Answer: (a) wheat
Explanation: Wheat grains are cereal seeds ground to make flour.
2. It is a fruit which is cooked and eaten as a vegetable.
(a) apple
(b) tomato / brinjal
(c) banana
(d) orange
Answer: (b) tomato / brinjal
Explanation: Scientifically, tomatoes and brinjals develop from flowers and contain seeds, making them botanical fruits eaten as vegetables.
3. It is the age at which babies can start eating semi-solid foods.
(a) 1 month
(b) 6 months
(c) 3 years
(d) 5 years
Answer: (b) 6 months
Explanation: Around 6 months of age, infants are introduced to mashed dal, khichdi, and stewed fruits alongside mother’s milk.
4. The type and amount of food consumed and needed by different persons depends upon their—
(a) age and physical activity
(b) height only
(c) clothes
(d) shoes
Answer: (a) age and physical activity
Explanation: Growing children and hardworking labourers require more energy-rich food compared to sedentary or elderly individuals.
D. Answer the following questions in brief.
Question 1: Name the two sources of our food.
Answer: The two sources of our food are:
- Plants: Give us cereals, pulses, vegetables, fruits, nuts, and spices.
- Animals: Give us milk, eggs, honey, fish, and meat.
Question 2: Name the parts of plants which are used as food.
Answer: We eat roots (carrot), stems (potato), leaves (spinach), flowers (cauliflower), fruits (mango), and seeds (wheat, rice, pulses).
Question 3: How do we obtain wheat flour?
Answer: Wheat crops are harvested to collect wheat grains (seeds). These grains are thoroughly cleaned, washed, dried, and ground inside a flour mill (chakki) to produce fine wheat flour (atta).
Question 4: Name any two roots which are eaten as food.
Answer: Carrot and Radish (also Beetroot and Turnip).
Question 5: Why do we need to eat nuts?
Answer: Nuts like almonds, walnuts, and peanuts are packed with healthy fats, proteins, vitamins, and minerals. They keep our body warm in winters, provide long-lasting energy, and improve brain health.
E. Answer the following questions.
Question 1: Why are milk and milk products regarded as “good food” for one and all?
Answer: Milk is regarded as a complete food because:
- It contains almost all essential nutrients: calcium for strong bones and teeth, proteins for body growth, and vitamins for good health.
- It is easily digested by people of all ages—from small infants to elderly grandparents.
- It can be consumed as wholesome milk or nutritious dairy products like curd, paneer (cottage cheese), butter, and cheese.
Question 2: Why are green vegetables and fruits important for us?
Answer: Green vegetables and fruits are protective foods:
- They are rich in essential vitamins (like Vitamin A and C) and minerals (like Iron and Calcium) that protect us from illnesses.
- They provide dietary roughage (fibre) which keeps our digestive system clean and prevents constipation.
- They keep our skin glowing, improve eyesight, and boost immunity against viral infections.
Question 3: What kind of food is preferred by old people?
Answer: Old people prefer food that is:
- Soft and easy to chew: Such as khichdi, dalia, vegetable soup, and boiled rice, because elderly people often have weak or missing teeth.
- Light and easily digestible: Low in heavy oils, spices, and fats, so their sensitive digestive system can absorb nutrients comfortably.
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