Category: SCHOOL EDUCATION
-
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…
-
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…
-
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…
-
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…
-
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…
-
WHAT IS PSYCHOLOGY?
Before getting to know what Psychology is we should understand first what psychology is not. Psychology is a science and not based on common sense and age hold wisdom. Psychology is not about to predict what others are thinking. After reading psychology we are not only dealing with differently abled person, it is a vast…
-
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…
-
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…
-
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…
-
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.…