NCERT Summary: Food - Where does it come from | Science Class 6 PDF Download

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:

• For energy
• For work
• For body function
• For good health
• For wound healing

Sources of the food

There are two main sources of food:

1. Plants
2. 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

• 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.