Extra 20 important long questions with answers from Chapter:1 Food: Where Does It Come From? (Class 6 CBSE Science):-
Long Answer Questions (5 to 6 Points Each)
1. Why do we need food?
Answer: Food is essential for life because:
It provides energy for daily activities.
It helps in body growth and development.
It repairs damaged body cells and tissues.
It protects us from diseases by building immunity.
It helps in proper functioning of organs.
It maintains body temperature and overall health.
2. What are the main sources of food? Explain with examples.
Answer: The two main sources of food are:
(a) Plants – They provide vegetables, fruits, cereals, pulses, and spices.
Example: Wheat, Rice, Spinach, Mango.
(b) Animals
– They provide milk, eggs, meat, and honey.
Example: Cow (milk), Hen (egg), Goat (meat), Honeybee (honey).
3. What are the different edible parts of plants? Give examples.
Answer: Different parts of plants that we eat include:
Roots
– Carrot, Radish, Beetroot.
Stems
– Sugarcane, Potato, Ginger.
Leaves
– Spinach, Cabbage, Mint.
Flowers
– Cauliflower, Broccoli.
Fruits
– Mango, Apple, Banana.
Seeds
– Wheat, Rice, Pulses.
4. What are herbivores, carnivores, and omnivores? Give examples.
Answer: Animals are classified based on their eating habits:
Herbivores
– Animals that eat only plants. (e.g., Cow, Deer, Goat)
Carnivores
– Animals that eat only meat. (e.g., Lion, Tiger, Wolf)
Omnivores
– Animals that eat both plants and animals. (e.g., Humans, Bears, Crows)
5. Explain why honeybees are important for humans.
Answer: Honeybees are useful because:
They produce honey, which is a natural sweetener.
Honey has medicinal properties and is used to treat cough and cold.
Beeswax is used in making candles, cosmetics, and medicines.
Honeybees help in pollination, increasing crop production.
They contribute to the balance of nature by aiding in plant reproduction.
Beekeeping is an important occupation for many farmers.
6. What is sprouting? How is it beneficial?
Answer: Sprouting is the process of soaking and germinating seeds like moong and chana. Benefits include:
Increases protein, vitamin, and mineral content.
Makes food easier to digest.
Enhances
fibre
content for better digestion.
Provides instant energy.
Is a healthy food choice for all age groups.
Can be eaten raw or lightly cooked.
7. How is milk a complete food?
Answer: Milk is called a complete food because:
It contains proteins for body growth.
It has calcium for strong bones and teeth.
It provides carbohydrates for energy.
It contains vitamins like A, D, and B-complex.
It is easily digestible.
It is used to make curd, cheese, butter, and other dairy products.
8. How are cereals different from pulses?
Answer: The differences between cereals and pulses are:
Cereals
:
Rich in carbohydrates.
Provide energy to the body.
Examples: Rice, Wheat, Maize.
Pulses
:
Rich in proteins.
Help in body growth and repair.
Examples: Moong dal, Chana dal, Kidney beans.
9. What is a food chain? Explain with an example.
Answer: A food chain shows how energy flows from one living thing to another. Example:
Plants
(Producers) – Make food using sunlight.
Herbivores
(Primary Consumers) – Eat plants. (e.g., Deer)
Carnivores
(Secondary Consumers) – Eat herbivores. (e.g., Lion)
Decomposers
– Break down dead organisms (e.g., Bacteria, Fungi).
10. Why should we not waste food?
Answer: Food should not be wasted because:
Many people in the world do not get enough food.
Wasting food leads to wastage of resources like water and
labour
.
It increases food prices.
It affects the environment through excess waste.
Saving food helps in reducing hunger and poverty.
Leftover food can be reused or given to needy people.
11. How do we get oil from plants? Name some oil-producing plants.
Answer:
Oil is extracted from the seeds of plants.
Seeds are crushed, and oil is separated.
Used in cooking, making soaps, and cosmetics.
Examples: Mustard, Sunflower, Groundnut, Coconut.
12. What are beverages? Give examples.
Answer: Beverages are liquid drinks obtained from plants or animals. Examples:
Plant-based
: Tea, Coffee, Fruit juice.
Animal-based
: Milk.
13. What are the benefits of eating fruits and vegetables?
Answer:
Provide essential vitamins and minerals.
Improve digestion due to
fibre
content.
Help in disease prevention.
Keep the skin and hair healthy.
Maintain proper body weight.
Give natural sugars for instant energy.
14. How is food prepared by plants?
Answer: Plants prepare food through photosynthesis:
Takes place in leaves using chlorophyll.
Requires sunlight, water, and carbon dioxide.
Produces glucose (food) and oxygen.
Oxygen is released into the air.
Plants store food in different parts like roots and fruits.
15. Why are green plants called producers?
Answer:
Green plants prepare their own food by photosynthesis.
They do not depend on other organisms for food.
They form the base of the food chain.
Provide food for herbivores, which in turn feed carnivores.
They release oxygen necessary for survival.
Examples: Grass, Trees, Crops.
16. What are dairy products? Give examples.
Answer: Dairy products are foods made from milk. Examples:
Butter
Cheese
Curd
Paneer
Ice Cream
17. Why should we eat fresh food instead of packaged food?
Answer:
Fresh food has more nutrients.
Packaged food contains preservatives.
Fresh food is free from artificial chemicals.
Packaged food can be harmful if eaten in excess.
Fresh food supports a healthy immune system.
18. What are spices? Give examples.
Answer: Spices are plant-based substances used to flavour food. Examples:
Turmeric
Black Pepper
Cumin
Cloves
19. How do farmers grow food crops?
Answer:
They prepare the soil by
ploughing
.
Sow seeds.
Water the crops.
Add fertilizers.
Protect from pests.
Harvest the crops when ready.
20. What is food adulteration?
Answer: Adding harmful substances to food to increase quantity is food adulteration. Examples:
Mixing water in milk.
Adding
colours
to spices.
Using artificial ripening agents on fruits.
