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Sonali Aggarwal 7 years, 7 months ago
Crystallisation
Filtration
Sublimation
Evaporation
Simple distillation
Posted by Dharmendra Kumar 7 years, 7 months ago
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Yogita Ingle 7 years, 7 months ago
The main components of foods are carbohydrates, protein, fats, vitamins and minerals. These are called nutrients.
Carbohydrates: Carbohydrates are also called energy giving food. It is the main sources of energy. It is made up of carbon, hydrogen, and oxygen. There are three types of carbohydrates.
Protein: Protein helps in body growth and repairs the tissues so it is also called body building food. We get protein from milk, eggs, meat, fish and all kinds of pulse.
Fat: Fats are made up of carbon, hydrogen and oxygen. Butter, ghee, milk, egg-yolk, nuts and cooking oils are the major sources of fat in our food.
Vitamins: Vitamins are complex organic compounds which are essential for the growth and maintenance of our body. It does not provide energy.
Minerals: Minerals are required by our body in very small quantities. Iron, Iodine, calcium, phosphorus, sodium and potassium are common minerals. The sources of these animals are plants and animals.
Posted by Aditya Shah 7 years, 7 months ago
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Yogita Ingle 7 years, 7 months ago
Filtration: This method is used for separating fine insoluble solid particles from the liquid. In this process, the mixture is passed through a filter. The solid particles do not pass through the filter and clear liquid is collected.
Decantation: This process is used after sedimentation. The upper layer; which contains water is slowly poured out from the container. It leaves the sediment behind.
Sedimentation: Insoluble particles settle down at the bottom and the process is called sedimentation. For example; muddy water contains soil and sand in water. Soil and sand; being insoluble in water; settle down at bottom if water is allowed to stand for some time.
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Yogita Ingle 7 years, 7 months ago
Translucent: The material through which light can pass partially is called translucent, e.g. butter paper, thin curtain, etc.
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Yogita Ingle 7 years, 7 months ago
The main components of foods are carbohydrates, protein, fats, vitamins and minerals. These are called nutrients.
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Meghna Thapar 5 years, 11 months ago
The various sources of vitamin A are milk, carrot, butter, fish liver oil, eggs, green vegetables, mango and papaya.
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Lenka Kesava Sri Harsha 5 years, 10 months ago
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Meghna Thapar 6 years ago
Leaves get rid of excess water from the plants through transpiration through stomata.
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Meghna Thapar 6 years ago
Properties of Materials
- Appearance:
On the basis of appearance, materials are classified into two groups - lustrous and non-lustrous. The materials which have a shiny appearance are called lustrous. Examples – metals (gold, silver, copper, aluminium and iron) and metal alloys (steel, stainless steel, brass, etc).
Those materials which have dull appearance are said to be non-lustrous. Examples – paper, wood, chalk, cotton, plastic, rubber, etc.
- Hardness and softness:
On the basis of hardness or softness, materials are of two types – hard and soft.
Hard materials cannot be easily compressed, cut, bent or scratched. Examples – diamond, teeth, bones, steel, wood, etc. Soft materials can be easily compressed, cut, bent or scratched. Examples – sponge, cotton, wool, foam, rubber, etc.
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Sonali Aggarwal 7 years, 7 months ago
An odourless, tasteless white substance occurring widely in plant tissue and obtained chiefly from cereals and potatoes. It is a polysaccharide which functions as a carbohydrate store and is an important constituent of the human diet.
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Meghna Thapar 6 years ago
- Those organisms which consume food prepared by producers are called consumers.
- Example - Lion and Tiger.
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(i) The animals which eat only plants are called herbivores. All herbivores are primary consumers. Example – Goat and cow.
(ii) The small carnivores which feed on herbivores (primary consumers) are called secondary consumers. Example – Frog and bird.
(iii) The Large carnivores (or top carnivores) which feed upon the small carnivores (secondary consumers) are called tertiary consumers. Example – Lion and tiger.(iv) Those animals which eat both plants and animals, are called omnivores. Example – Crow, dog, man, sparrow.
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