Class-9-Science

Matter in our Surroundings Theory Session-10

In this session is effect of change of pressure on the state of matter, liquefaction of gases, discussed.

Structure of The Atom Theory Session-1-Part-1

In this session teacher has discussed about - Structure of the atom. Discovery of electrons, characteristic of electron : mass of an electron – charge of an electron.

Structure of The Atom Theory Session-1-Part-2

In this session teacher has discussed about - Structure of the atom. Discovery of protons, Characteristics of a proton – mass of a proton – charge of proton, Discovery of neutrons – mass of a neutron – charge of a neutron.