NCERT Class 7 Science Chapter 6 - Physical and Chemical Changes Notes
Chapter 6 - Physical and Chemical Changes Notes 1. The changes around us can be broadly classified as - physical and chemical change. 2. Pro...
NCERT Class 7 Science Chapter 5 - Acids, Bases and Salts Notes
Chapter 5 - Acids, Bases and Salts Notes 1. The substances that tastes sour are called acid. Example: Curd, Lemon juice, Vinegar etc. 2. Sub...
NCERT Class 7 Science Chapter 4 - Heat Notes
Chapter 4 - Heat Notes 1. Heat is a form of energy. 2. A reliable measure of the hotness of an object is its temperature. Temperature is mea...