high school science requirements

Light does not require a material medium for its propagation. In a given medium light travels with a very high but finite velocit..

Electricity is obtained from flowing water. Water from the dam is allowed to flow through the tunnels at a high pressure. Turbines convert the potential energy of the water into electrical energy. About 23,800 MW of energy is generated by hydel power in India. Hydel power requires..

Nature of Light - Light is a form of energy and can be transformed into other forms of energy. You would have observed the path of 'a beam of light' inside a room. This beam is nothing but the scattered light produced by the dust particles. Beam of light becomes invisible if the room is dust free. ..

The rhythmic contractions and relaxation of the heart create high pressures required to keep the blood vessels from collapsing and also to ensure that all parts of the body get the supply of blood that is so vital to their survival and functioning. The pressure created during t..

Maximum yield of eggs is obtained by keeping the poultry in comfortable, well ventilated, dry, clean and properly lighted houses. Birds of different ages should be kept separately. The first phase in the life of poultry is called the growing period and the chickens are called growers. During this s..

Certain reactions take place with the help of an electric current. Example: Decomposition of water (acidulated) to give hydrogen and oxygen gas. Pressure Some chemical reactions need very high pressure to proceed. Example, in the manufacture of ammonia from nitrogen and hydroge..

Coepea (Lobiya) Vigna sinensis Horse-gram Macrotyloma uniflorum Senj Melilotus parvifora This type of manuring is used in fields in which crops like rice, maize, sugarcane, cotton, wheat etc., which require high nutrient input are raised. There is 30 - 50% incre..

Water is a unique and remarkable compound, essential to all forms of life. Human beings and the flora and fauna cannot survive without water on this planet. A large amount of life on this planet is aquatic based i.e., can only survive in water. It is the most abundant substance after air in the ea..

>d- Block elements are the elements of group 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 placed in the middle of the table. They are also known as transition elements. The inner transition or f-Block elements - lanthanides and actinides, are placed in two separate horizontal series at the bottom of the peri..

Take a potted plant and destarch it by keeping it in darkness for 24 hours. To one of the leaves attach a piece of metal foil or paper on both sides. Leave the plant in sunlight for 48 hours. Then take the leaf and remove its metal foil. Decolourise the leaf as in the above experiment and test for..