This PSEB 6th Class Science Notes Chapter 1 Food Where Does it Come From will help you in revision during exams.
PSEB 6th Class Science Notes Chapter 1 Food Where Does it Come From
→ All living beings need the energy to carry out their daily activities.
→ Food is needed by living beings for their growth, getting energy for doing work, replacement and repair of their damaged body parts, and protection against diseases.
→ Different varieties of food like fruits, vegetables, milk products, sweets, eggs, meat, chapati, and bakery products are present in nature.
→ The materials needed to prepare food items are called ingredients. Food materials can be made of one or two or many ingredients.
→ Plants are the chief source of food for us and other animals. However, few food materials are also obtained from animals.
→ Green plants can prepare their own food by using sunlight, carbon dioxide, and water to prepare their food. This process is called photosynthesis.
→ Every part of a plant where the food is stored is edible i.e. seed, flower, stem, root, leaf.
→ The plant parts which are used by us as food are called edible parts.
→ We eat roots of carrot, radish, turnip, sweet potato, etc. We also use stems of certain plants.
→ Some stems like those of ginger, potato, onion, turmeric grow underground and store food.
→ Stems of ginger and turmeric are used as spices.
→ The stem of sugarcane is used to make juice, sugar, and jaggery.
→ We eat different types of fruits like apple, mango, guava, papaya, orange, etc.
→ All these fruits are eaten raw i.e. without cooking. We make jams and pickles from some fruits.
→ Fruits are essential for good health as these are important sources of vitamins and minerals.
→ We use leaves of various plants like mustard, spinach, cabbage, coriander, mint, etc.
→ We use seeds of many plants as food like wheat, rice, maize, gram, peas, kidney beans and green gram (moong), etc.
→ Seeds of some crops like gram, peas, kidney beans, and green gram (moong) are known as pulses whereas seeds of wheat, rice, and maize are known as cereals.
→ We get milk, honey, meat, eggs, oil, etc. from animals.
→ Honey contains sugar, water, minerals, enzymes, and vitamins. Nectar of flowers is a source of honey.
→ On the basis of the food taken by animals, there are three categories of the animals:
→ Herbivores are the animals that eat only plants and plant products are called herbivores, e.g. cows, goats, rabbits, sheep, deer, elephants, etc.
→ Carnivores are the animals which eat other animals are called carnivores, e.g. lions, tigers, lizards, snakes, etc.
→ Omnivores are the animals which eat both plants and animals are called omnivores. e.g. Crow, bear, dog, and rat, man, etc.
→ Milk contains proteins, sugar, fats, and vitamins.
→ It is used worldwide as food that can be converted into dairy products like cheese, butter, curd, cream, etc.
→ People eat the meat of goats, sheep, chicken, fish, and sea animals like prawns, crab.
→ Meat is also used as food and it contains a great number of proteins and fats.
→ People eat eggs of hen and duck and other birds.
→ The white part of the egg is called albumen and the yellow part of the egg is called yolk.
→ Albumen is rich in proteins and you are rich in fats.
→ Food: Substances providing energy to do work, maintain body heat, protect us from diseases, etc. is called food.
→ Balance diet: A diet that contains all the nutrients needed by the body is called a balanced diet.
→ Edible: The substances/materials which are safe for eating are called edible substances.
→ Ingredients: Materials needed to prepare food Items.
→ Pulses: Seeds of some crops like gram, peas, moong.
→ Cereals: Seeds of grass crops e.g. wheat, rice, maize
→ Albumin: White part of the egg.
→ Yolk: Yellow part of the egg
→ Nectar: Sugary fluid present in flowers
→ Herbivores: Plant-eating animals are called herbivores.
→ Nectar: Sugary fluid present in flowers
→ Autotrophs: Organisms that can prepare their own food by photosynthesis.
→ Heterotrophs: Organisms that depend on other organisms for food
→ Herbivores: Organisms that eat only plants and plant products
→ Carnivores: Animals eating other animals are called carnivores.
→ Omnivores: Animals that eat both plants and animals are called omnivores.