Video Lecture on CLASS 9 (JNVST) GENERAL SCIENCE Sound part-2

Food –Crop Production and Management

Microorganism

COOKING AND PRESERVING TECHNIQUES

Materials I –Synthetic fibers; Plastics; Metals and Non–metals

Cell structure and Function

Material II –Coal and Petroleum; Refining of Petroleum; Fossil Fuels; Combustion and Flame

Conservation of Plants and Animals –Wildlife Sanctuary and National Parks

Reproduction –Asexual and Sexual Reproduction, Reaching the age of adolescence

Force –Frictional Force; Gravitational Force; Thrust and Pressure

Light –Reflection of Light; Multiple Reflection; Human eye; Care of the Eyes; Sound; Human ears; Loudness and Pitch, Audible and inaudible Sounds

Chemical Effects of Electric Current AND Electroplating

Natural Phenomena –Lightning; Earthquakes, Pollution of Air and Water

Solar system; Stars and Constellations

MIXED QUIZZES

Sample Papers

Sound part-2

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