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Page No. 141 Q1: What do we get from cereals, pulses, fruits, and vegetables? Ans: The things we get from cereals,

Page No. 129 Q1. How does the sound produced by a vibrating object in a medium reach your ear?Ans: When the

Page No. 115 Q1. A force of 7 N acts on an object. The displacement is, say 8 m, in

Page No. 102Q1. State the universal law of gravitation.Ans: Everybody in this universe attracts every other body with a force, which is

Page No. 91 Q1. Which of the following has more inertia?(a) A rubber ball and a stone of the same size?(b)

Page No. 74 Q1. An object has moved through a distance. Can it have zero displacements? If yes, support your

Page No. 61 Q1. What is a tissue?Ans: A group of cells that are similar in structure and/or work together to

Page No. 51 Q1. Who discovered cells and how?Ans: Q2. Why is the cell called the structural and functional unit

Page No. 39 Q1. What are canal rays?Ans: Canal rays are a type of positively charged radiation discovered by E. Goldstein in