CBSE Class 6 Science Food Where Does It Come From Notes

CBSE Class 6 Science - Food Where Does it Come from Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations. 

Topics in the chapter

- What is food, Variety of food, ingredients of food
- Use of food in our body
- Sources of food
- Classification of Animal- Herbivores, Carnivores,Omnivores

What is food, Variety of food,Ingredients of food?

- Food is source of nutrition that living organisms eat, drink or absorb to maintain life and growth.
- There are many different places where we buy food like markets, shop, supermarkets etc.
- We eat different variety of foods like fish, rice, bread, vegetables meat etc.

Food ingredients

- Ingredients are the materials used for making food item.
Examples: - The ingredient of rice is water and raw rice
The ingredient of dal is raw dal,spices and water

Use of food in our body

Food in our body is used for various reasons. They are:
(i) For energy
(ii) For work
(iii) For body function
(iv) For good health
(v) For wound healing.

Sources of the food

There are two main sources of food:
(a) Plants
(b) Animals

There are many different types of foods that come from animals:
- Eggs come from chicken.
- Cows, goat and buffaloes are some common animals which gives us milk and milk products like butter, cream, cheese and curd.
- Bacon come from a pig.
- Honey is made by bees, Honey bee collects fruit juices (nectar) from flowers and stores in their hive.
- Fish cakes are made from fish.

There are many different types of foods that come from Plants:
- Roots as food: - Carrot, Beetroot,Radish, Turnip, etc.
- Stem as food: - Potato, Ginger, Sugarcane.
- Leaves as food: - Spinach,Coriander, Cabbage, Onion etc.
- Flowers as food: - Rose, Cauliflower, Bauhinia etc.
- Fruits as food: - Apple, Banana,Tomato, Grapes etc.
- Seeds as food: - Corn, Wheat,Maize, Pulses etc.

Some plants have two or more edible parts: - mustard seeds give us oil and its leaves are also used as vegetable.

Classification of animal based on food they eat

Herbivores
- Animals which eat only plants or plant products as their food are called as Herbivores.
- Herbivores animals have sharp teeth for biting and cutting, and very strong teeth for grinding as plant food needs to be chewed a lot as it is very rich in a substance called cellulose.
Examples: Cow, goat, horse etc.

Carnivores
- Animals which eat the flesh of other animals are called carnivores.
- Most of the carnivorous animals have very sharp teeth for tearing out the flesh of its prey.
- Examples: Lion, tiger, snake and lizard (it eats insects i.e., other animals)

Omnivores
- Animals which eat both plants and animals are called omnivores.
- Examples: Dog, man.

Q1) Why does an organism need food?

Ans1-1.To get energy.

2. For growth , repair and maintenance of the body.

3. To fight diseases.

Q2)Why is glucose given to sportspersons?

Ans2-glucose is a type of carbohydrate, which can be quick source of energy.

Q3)Why do we cook food?

Ans3-1.to make food digestible and to improve its taste.

2. cooking also kills the germs that are sometimes present in food.

Q4)Why is it necessary to drink about 1.5 litres of water everyday?

Ans4-Excretion ,sweating and breathing makes us lose about 2-3 litres of water everyday. About 1.5 litres is made up for by drinking water and other liquids.

Q5)Why water is needed for our body?

Ans4-1. Water helps to carry digested food around the body.

2. Water help to carries wastes out of the body

3. It helps to regulate the body temperature.

Q5) List the various edible parts of the plants, mention some examples also.

Ans5-ROOT-carrot, raddish, beetroot, turnip, sweet potato

STEM  -   sugar cane, ginger, onion, potato, colocasia (arbi)

LEAF  -  spinach, cabbage, lettuce, methi

FLOWER  -  cauliflower, broccoli, banana, pumpkin, clove, saffron

FRUIT  -  banana, mango, brinjal, tomato, cucumber

SEED  -  pulses, peanuts, coconut, methi seeds, almonds

Q6) Classify the following as herbivore, carnivore or omnivore.

Ans6-Herbivore-cows, goats, horses, elephants, giraffes, parrot, squirrel

Carnivore-crocodile, shark, tigers, lions, snake

Omnivore-bears, crow, humanbeing, cockroach

Q7)Where does honey come from?

Ans7- Bees collect NECTAR(sweet juices) from flower, convert it into honey and store it in their hive.

Q8) Mention the source of food as plant or animal, for the following food items.

a)Chicken-animal    b)rice-plant      c)onion-plant      d)oil-plant and animal

e)sugar-plant         f)milk-animal     g)egg-animal      f)wheat flour-plant.

Q9)What are sprouted seeds?

Ans9- A small white structure grown out of the seeds, which will be future shoot of the plants.

Q10)Write the ingredients and sources(plant or animal) for the given food items?

Ans10)

FOOD ITEM                 INGREDIENTS                           SOURCE

Potato curry                  1.potato,garlic, onion, tomato       plant

2. oil/ghee                   plant or animal

3. spices                            plant

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Food

The component that we consume, which provides nourishment to the body, is called food.
E.g., Rice, chapati, curry, fruits, vegetables, cheese, bread, milk, curd, butter, etc.

Ingredients

The components or materials required to prepare a food item are called as ingredients.
E.g., different types of vegetables, spices are ingredients for sambar.

Food Materials and Sources

Food Items

• We eat different food items every day.
• Each of these food items requires ingredients to make them.
• E.g., Chicken curry is made with chicken, spices, oil/ghee and water.

Food Sources

• The ingredients of a food item can be obtained from either plants or animals.
• So there are plant products and animal products.
• E.g., We get rice grains from rice plants.
• Chicken is an animal source of food.
• Items like salt and water make a third category.

Plant Parts and Animal Products as Food

Plant Products

• The food products that we get from plants are called as the plant products.
• E.g., ginger is the root of a plant that we use in cooking.

Animal Products

• The food products that we get from animals are called animal products.
• E.g. Milk, butter, chicken, meat, honey etc.

What Do Animals Eat?

Food Habits

• The method of eating or choices of food followed by living organisms is called as food habit.
• E.g. a rabbit eats grass or plant-based food.

Herbivores

Animals which feed on plants are called herbivores (Herba: herb; -vore: to devour or eat).
E.g., cow, goat etc.

Carnivores

Animals which feed on other animals are called carnivores (Caro: meat or flesh; -vore: to devour or eat).
E.g., lion, tiger, cheetah, etc.

Omnivores

Animals which feed on both plants and other animals are called omnivores (Omni: all, everything; -vore: to devour or eat).
E.g., bears, pig, crow, chipmunk, etc. They feed on flesh as well as honey.

Food Variety and Sources

Our country is so diverse in culture, customs and languages and so on. Most fascinating one is the diversity in the food we eat. From state to state, from time to time, the food we eat varies. Whether it is cooked or uncooked, the main sources of anything we eat are plants and animals.

Plants as source

• Most of the parts of plants such as leaves, flowers, roots, stems, are edible.
• Carrots, beetroot, radish are some root vegetables.
• Spinach and cabbage are leafy vegetables.
• Tomato, brinjal, lady’s finger are few fruit vegetables.
• Note: Every part of every plant is not consumable; sometimes they can be toxic and allergens.

Animals as source

• They give us milk, eggs, meat and many other products like cheese, ghee, honey, etc.
• Animals depend on plants for their food.
• Directly or indirectly, plants are the primary producers and primary source of food.

Diet of Animals

In the food web, animals are categorized as consumers. The primary producers called plants provide them things to eat and shelter. Based on the diet, animals are classified into three groups:

• Herbivores (primary consumers): Animals that depend on plants directly; they eat only plants.
• Carnivores (secondary consumers): Flesh-eating animals. They feed on herbivorous animals.
• Omnivores (secondary consumers): Animals which derive their nutrients from both animal and plant products; it may also include worms and fungi.