Science Class 9

Chapter 18 Observing Space: Telescopes Textbook Questions and Answers 1. Fill in the blanks with the proper words. a. The wavelength of visible light is between …………………..….. and …………………..…. .…

Chapter 17 Introduction to Biotechnology Textbook Questions and Answers 1. Each of the following statements is wrong. Rewrite them correctly by changing either one or two words. a. Simple squamous…

Chapter 16 Heredity and Variation Textbook Questions and Answers 1. Complete the following sentences by choosing the appropriate words from the brackets. (Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA,…

Chapter 15 Life Processes in Living Organisms Textbook Questions and Answers 1. Match the pairs and explain. Column ‘A’ Column ‘B’ (1) Growth of pollen tube towards ovules (2) Growth…

Chapter 14 Substances in Common Use Textbook Questions and Answers 1. Fill in the blanks. a. The number of molecules of water of crystallization in washing soda is …………….…. .…

Chapter 13 Carbon: An Important Element Textbook Questions and Answers 1. Select the proper option and complete the statements (single, all, double, ionic, carbon, give and take, hydrogen, multiple, share,…

Chapter 12 Study of Sound Textbook Questions and Answers 1. Fill in the blanks and explain. a. Sound does not travel through ……………………….……….. . b The velocity of sound in…

Chapter 11 Reflection of Light Textbook Questions and Answers 1. Answer the following questions. a. Explain the difference between a plane mirror, a concave mirror and a convex mirror with…

Chapter 10 Information Communication Technology (ICT) Textbook Questions and Answers 1. Fill in the blanks to complete the statements. Justify the statements. a. While working with a computer we can…

Chapter 4 Measurement of Matter Textbook Questions and Answers 1. Give examples. a. Positive radicals Answer: Na+– Sodium ion, K+ – Potassium ion b. Basic radicals Answer: Na+ – Sodium…