Author: Smriti Kanchan
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FLOW OF HEAT
Heat is a form of energy that always flows from a hot body to a cold body. This flow of heat is known as transmission or transfer of heat. Heat travels from a region of higher temperature to a region of lower temperature in three ways. Conduction Convection Radiation CONDUCTION When the transfer of heat…
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SOIL – Class 7
Soil is the upper most part of the surface of land. It contains many particles in it. FORMATION OF SOIL Weathering is a process in which huge rocks are broken down by the action of heat, wind, water and other natural and anthropogenic way to form small particles called soil. Formation of soil is a…
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NUTRITION IN ANIMALS – Class 7
Animals are the living organisms which do not have plastids in their cell, thus are unable to perform photosynthesis ad moreover they do not have cell wall, thus they are grouped into another kingdom i.e. Animalia. Animals thus do not posses cell wall nor plastid. Lack of plastid results in a different mode of nutrition…
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NUTRITION IN PLANTS – Class 7
What are Plants? Plant cell have plastids, which is not present in animal cell. Plants have cell wall, which is absent in animal cell. NUTRIENTS • Nutrients are compounds in foods which are essential to life and health, providing us with energy, the building blocks for repair and growth and substances necessary to regulate chemical…
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FORCE AND PRESSURE
Force is a push or a pull on an object. It changes or tends to change the state of rest or the state of motion of an object by a push or pull. It cannot be seen, but its effect can be seen or felt. It is caused by an interaction. An interaction of one…
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SERICULTURE
The rearing of silk worm for commercial purpose is called Sericulture. It is SILK FARMING. Silk Moth belongs to Family: Bombycidae Order: Lepidoptera LIFE CYCLE OF SILK MOTH The life cycle is complete and consist of 4 stages Egg Larva Pupa Adult. The eggs hatch to form larvae. The larvae of silk moth are called…
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BHOPAL GAS TRAGEDY (NEET)
On the night of 2nd and 3rd December 1948 an incident took place. It is one of the world worst Industrial disaster. A gas named methyl isocyanate (MIC). Over 50,000 people died in this Catastrophic incident. Methyl Isocyanate (MIC) Methyl Isocyanate is a colourless liquid used for making pesticides. The chemical is very reactive. Methyl…
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STRUCTURE OF ATOM (ISOTOPES) – NEET
ISOTOPES The atoms which have same atomic number but different mass number is called isotopes. The atoms which have same number of protons but different number of neutrons is called Isotopes. structure of atom subatomic-particles EXAMPLE An oxygen contains 8 Protons, so the Atomic number of Oxygen is 8 and mass number is 16 (refer…
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APICULTURE (NEET)
It is the scientific method of rearing of Honeybees for obtaining honey and other useful products from the Honeybee. The word Apiculture is derived from the Latin word were ‘apis’, meaning bee, so it is the method of rearing of honeybee or bee- keeping method. Honey-bee belong to Apis species. SPECIES OF HONEY-BEE Apis mellifera…