Class 8 Science NCERT Solutions Chapter 18: Pollution of Air and Water Question 1. What are the different ways in which water gets contaminated? Answer. Water gets contaminated due to the addition of substances harmful to health. Sewage, agricultural chemicals, and industrial waste are some of the major contaminants of water. Question 2. At an […]
Class 8 Science NCERT Solutions Chapter 17: Stars and the Solar System Choose the correct answer in Questions 1-3: Question 1. Which of the following is NOT a member of the solar system? (a)Â An asteroid (b)Â A satellite (c)Â A constellation (d)Â A comet Answer. (c) A constellation. Question 2. Which of the following is NOT a planet
Class 8 Science NCERT Solutions Chapter 16: Light Question 1. Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain. Answer. We cannot see objects in the darkroom. But, we can see objects outside the room, in case there is light outside the
Class 8 Science NCERT Solutions Chapter 15: Some Natural Phenomena Select the correct option in Questions 1 and 2. Question 1. Which of the following cannot be changed easily by friction? (a)Â A plastic scale (b)Â copper rod (c)Â An inflated balloon (d)Â A woolen cloth. Answer. (b) A copper rod. Question 2. When a glass rod is rubbed
Class 8 Science NCERT Solutions Chapter 14: Chemical Effects of Electric Current Question 1. Fill in the blanks: Most liquids that conduct electricity are solutions of……..,……………and ………….. The passage of an electric current through a solution causes…………..effects. If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the………..terminal of the
Class 8 Science NCERT Solutions Chapter 13: Sound Question 1. Choose the correct answer: Sound can travel through (a)Â gases only (b)Â solids only (c)Â liquids only (d)Â solids, liquids and gases Answer. (d)Â solids, liquids and gases. Question 2. Voice of which of the following is likely to have minimum frequency? (a)Â Baby girl (b)Â Baby boy (c)Â A man (d)Â A woman
Class 8 Science NCERT Solutions Chapter 12: Friction Question 1. Fill in the blanks: Friction opposes the…………….between the surfaces in contact with each other. Friction depends on the.…………..of surfaces. Friction produces ………………. A sprinkling of powder on the carrom board.…………….friction. Sliding friction is……….than the static friction. Answer. relative motion smoothness (or irregularities or nature) heat reduces
Class 8 Science NCERT Solutions Chapter 11: Force and Pressure Question 1. Give two examples of each of situations in which you push or pull to change the state of motion of objects. Answer. (1) If a rubber ball or marble is placed on a very smooth surface and given a small push, it starts
Class 8 Science NCERT Solutions Chapter 10: Reaching the Age of Adolescence Question 1. What is the term used for chemical secretions of endocrine glands responsible for changes taking place in the body? Answer. The term used for secretions of endocrine glands is hormones, which are responsible for various changes taking place in the body.
Class 8 Science NCERT Solutions Chapter 9: Reproduction in Animals Question 1. Explain the importance of reproduction in organisms. Answer. The production of new individuals from their parents is known as reproduction. Reproduction is very important as it ensures the continuation of a species. If the process of reproduction does not exist, the species would
