Class 9

Exercises Q1. Explain the importance of reproduction in organisms.Ans: Reproduction is a biological process through which living organisms produce offspring similar to themselves. Living organisms reproduce to maintain their number and […]

“Reaching the Age of Adolescence” is a chapter in the Class 8 Science textbook that focuses on the physical and emotional changes that occur during puberty. Adolescence is a […]

Exercises Q1. Give two examples each of situations in which you push or pull to change the state of motion of objects.Ans: Examples of situations in which […]

Exercises Q1. Fill in the blanks:(a) Friction opposes the _____________ between the surfaces in contact with each other.Ans: Motion (b) Friction depends on the _____________ of surfaces.Ans: Nature […]

Q1. Choose the correct answer:Sound can travel through(a) Gases only(b) Solids only(c) Liquids only(d) Solids, Liquids, and Gases.Ans: (d) Solids, Liquids, and Gases.Sound speed in various medium […]

Q1: Fill in the blanks(a) Most liquids that conduct electricity are solutions of, _______,______and ______.Ans: Acids, Bases and Salts Electricity can be conducted through a liquid when […]