Chapter 9: The Bond of Love
NCERT Textbook Questions Thinking about the text(Page 119) Question 1.Given in the box are some headings. Find the relevant paragraphs in the text to match the headings. An Orphaned Cub; Bruno’s Food-chart; An Accidental Case of Poisoning;…
Chapter 10: Kathmandu
NCERT Textbook Questions Thinking about The Text(Page 131) Activity Question 1.On the following map mark out the route, which the author thought of but did not take, to Delhi.Answer:Route ¡s shown by dotted line Question 2.Find out…
Chapter 15: Communication Systems
15.1 Which of the following frequencies will be suitable for beyond-thehorizon communication using sky waves?(a) 10 kHz(b) 10 MHz(c) 1 GHz(d) 1000 GHz 15.2 Frequencies in the UHF range normally propagate by means of:(a) Ground waves.(b) Sky…
Chapter 14: Semiconductor
14.1 In an n-type silicon, which of the following statement is true:(a) Electrons are majority carriers and trivalent atoms are thedopants.(b) Electrons are minority carriers and pentavalent atoms are thedopants.(c) Holes are minority carriers and pentavalent atoms…
Chapter 18: Pollution of Air And Water
Pollution of Air and Water Class 8 Science NCERT Textbook Questions Question 1.What are the different ways in which water gets contaminated?Answer:Following are the ways by which water gets contaminated: Question 2.At an individual level, how can…
Chapter 13: Nuclei
13.1 (a) Two stable isotopes of lithium 6 3 Li and 7 3 Li have respectiveabundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium. (b)…
Chapter 17: Stars and The Solar System
Stars and The Solar System Class 8 Science NCERT 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…
Chapter 16: Light
Light Class 8 Science NCERT 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…
Chapter 15: Some Natural Phenomena
Some Natural Phenomena Class 8 Science NCERT 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)…
Chapter 14: Chemical Effects of Electric Current
Chemical Effects of Electric Current Class 8 Science NCERT Textbook Questions Question 1.Fill in the blanks.(a) Most liquids that conduct electricity are solutions of ______ , ______ and ______(b) The passage of an electric current through a…
