Chapter 13 Sound

Chapter 13 Sound Textbook Questions Question 1. Choose the correct answer. Sound can travel through (a) gases only (b) solids only (c) liquids only (d) solids, liquids, and gases Answer: (d) solids, liquids, and gases. Question 2. Voice of which of the following is...

Chapter 18 Pollution of Air And Water

Chapter 18 Pollution of Air And Water Textbook Questions Question 1. What are the different ways in which water gets contaminated? Answer: Following are the ways by which water gets contaminated: People dispose of garbage in the water. Many industries discharge their...

Chapter 17 Stars and The Solar System

Chapter 17 Stars and The Solar System Textbook Questions Choose the correct answer in Questions 1-3. Question 1. Which of the following is NOT a member of the solar system? (a) An asteroid (b) A satellite (c) A constellation (d) A comet Answer: (c) A constellation...

Chapter 16 Light

Chapter 16 Light Textbook Questions Question 1. Suppose you are in a dark room. Can you see objects in the room? Can you see objects out¬side the room? Explain. Answer: When we are in a dark room then we cannot see objects in the room. We can see the objects outside...

Chapter 15 Some Natural Phenomena

Chapter 15 Some Natural Phenomena Textbook Questions Select the correct option in Questions 1 and 2. Question 1. Which of the following cannot be changed easily by friction? (a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth Answer: (b) A...
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