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Science class 8 // important notes // Ak learning //Ak Raj.
Ch-01 CROP PRODUCTION AND MANAGEMENT Notes…! Till 10,000 B.C.E people were nomadic . They were wandering in groups from place to place in search of food and shelter.They ate raw fruits and vegetables and started hunting the animals foe food . Later they could cultivate land produce rice, wheat and other food crops. Thus was born ”AGRICULTURE”. CROPS:- When the same kind of plants are grown and cultivated at one place on a large scale. This is known as crops. Types of crops:- 1. cereals,2. vegetables,3. fruits India is a vast country. The climatic conditions like temperature,humidity and rainfall vary from one region to another.Accordingly, there is a rich variety of crops grown in many parts of our country. There are two broad cropping pattern are:- Kharif crops Rabi crops KHARIF CROPS:- The crops which are grown in the rainy s...
Science class 8 ch-2 important notes// Ak learning// Ak Raj.
Ch-2 MICROORGANISM FRIEND OR FOE NOTES:- 2.2 MICROORGANISM:- Those living organisms around us which we normally cannot see.These living organisms are called microorganisms. The water and soil are full of tiny organisms through no all of them fall into the category of microbes. These microbes or microorganisms are so small in size they cannot seen with unaided eye. Microorganisms are classified into four major groups are as below:- Bacteria Fungi Protozoa Algae Virus:- Virus is also a microscopic organism but these are different from microorganisms.They behave like non-living when they are outside the host cell,reproduce only when they are inside the host cell. Bacteria:- Bacteria are one of the oldest life forms. They are unicellular i.e. they are made up of one cell They appear in a variety of shapes & sizes (Spericals,elongated,spiral etc.) They inhabit soil,water,radioactive waste & the deep portion of the earth's crus...
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