Author: Smriti Kanchan
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POULTRY FARMING (NEET)
Poultry means domestication of birds for economic purposes. It includes chicken, pigeons, quails etc. MANAGEMENT OF POULTRY FARMING Managing of poultry farm in very important part for the growth of the birds and also for their better development, so it is very much important to have a well managed plan for their growth and development.…
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DISEASE CAUSING AGENTS (NEET)
When we talk about disease causing agent, we emphasis on the aspects that result in the diseases. There are number of agents that results in diseases. 1 .PHYSICAL AGENT The physical agent is characterized by TEMPERATURE PRESSURE HUMIDITY RADIATION As the temperature increases or decreases, the body need time to acclimatize to that surrounding. If…
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HUMAN HEALTH & DISEASE (NEET)
HEALTH A Person who is free from disease is not considered to be healthy, but a person who is Physically, Mentally & Socially fit is considered to be healthy. Many factors influence the health of a person, it includes: Balanced diet Regular exercise Personal hygiene Awareness about disease Immunization Proper disposal of wastes. DISEASE When…
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STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION (for NEET)
In this chapter we will be dealing with ANIMAL HUSBANDRY This is the Science and Art of management that deals with feeding, housing, breeding, cleaning, health care of common domestic animal for getting maximum benefits. ANIMAL BREEDING A group of organism that have similar characteristics, general appearance, features are said to belong to a common…
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Class 9th – STRUCTURE OF ATOM (Models)
DIFFERENT MODEL OF ATOM PROPOSED BY DIFFERENT SCIENTIST MODEL PROPOSED BY J.J THOMSON According to him, the atom consist of positively charged sphere and all the electrons are embedded in it. The positive and the negative charge are equal in number, thus making the atom neutral . POSTULATES: Atom consist of positive charge all over…
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Class 9th – STRUCTURE OF ATOM (Atomic & Mass Number)
We have already discussed the model of an atom and also were the subatomic particles are present inside an atom. Atomic Number As we know that the protons are present inside the nucleus , so the atomic no. of an element is defined as the number of protons present in an atom. Therefore, atomic number…
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Class 9th – STRUCTURE OF ATOM (Subatomic Particles)
We have already discussed in the chapter of atoms and molecules, how atoms are made and how molecules are made. In this chapter we will study in detail about the structure of Atom. An atom is made up of 3 sub-atomic particles; Protons. Electrons. Neutrons. PROTONS The discovery of proton was done by E. Goldstein.…
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Class 9th – VALENCY OF IONS
Valency of ion is equal to the charge of the ions. Cations carry positive charge whereas Anions carry negative charge. When the valency is 1 for cations, they are called as Monovalent Cations. When the valency is 2 for the cations, they are called as divalent cations. When valency is 3 for the cations, they…
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Class 9th – CHEMICAL FORMULAE
It determines the composition of a molecule of the Compound, with the symbols of the elements present in it. When a metal and a non metal combine it result in the formation of Ionic Compound. The compounds that are formed by Ions. The ions present in KNO3 (Potassium nitrate) are K⁺ & NO3ˉ Rules for…
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Class 9th – ATOMIC MASS OF AN ELEMENT
Atoms of elements are very small. To understand about atomic mass, it is a need to know about Carbon-12. Carbon-12 can be stated as no. of protons= 6 & no. of neutrons= 6 thus making it as 12. Carbon-12 atoms has been made as atomic mass of exactly 12 atomic mass unit. Earlier the unit…