Book Back Question and Answers

Science : Chapter 10 : Changes Around Us TEXTBOOK EXERCISE  I. Choose the best answer. 1. Burning of paper is a __________ change. a) physical b) chemical c) physical and chemical d) neutral [Answer: (b) chemical] 2. Burning of matchstick is an example for chemical reaction caused by __________ a) contact in physical states b) electricity […]

Science : Chapter 9 : Matter Around Us TEXTBOOK EXERCISE I. Choose the best answer. 1. The liquid metal used in thermometers is a) copper  b) mercury  c) silver  d) gold [Answer: (b) Mercury] 2. The pictorial symbol for water given by the alchemists was [Answer: (c) ] 3. Which one of the following element name

Science : Chapter 8 : Universe and Space Science TEXTBOOK EXERCISES I. Choose the best answer. 1. Which of the following is a celestial body? a) Sun b) Moon c) Stars d) All the above [Answer: (d) All the above] 2. Mangalyaan was sent to ________ a) Moon b) Mars c) Venus d) Mercury  [Answer:

Science : Chapter 7 : Magnetism TEXTBOOK EXERCISES I. Choose the best answer. 1. A magnet attracts __________. a) wooden materials b) any metal c) copper d) iron and steel [Answer: (d) iron and steel] 2. One of the following is an example for a permanent magnet. a) Electromagnet  b) Mumetal c) Soft iron d) Neodymium

Science : Chapter 6 : Sound TEXTBOOK EXERCISES I. Choose the best answer. 1. Sound waves travel very fast in a. air b. metals c. vacuum d. liquids [Answer: (b) metals] 2. Which of the following are the characteristics of vibrations? i.  Frequency ii.  Time period iii.  Pitch iv.  Loudness a) i and ii b) ii

Science : Chapter 5 : Electricity TEXTBOOK EXERCISES I. Choose the best answer. 1. When an ebonite rod is rubbed with fur, the charge acquired by the fur is a. negative b. positive c. partly positive and partly negative d. None of these [Answer: (b) positive] 2. The electrification of two different bodies on rubbing is

Science : Chapter 4 : Heat TEXTBOOK EXERCISES I. Choose the best answer. 1. Heat is a form of ________. a. electrical energy b. gravitational energy c. thermal energy d. None of these [Answer: (c) thermal energy] 2. If you apply some heat energy to a substance, which of the following can take place in it?

Science : Chapter 3 : Light TEXTBOOK EXERCISES I. Choose the best answer. 1. Which of the following has curved reflecting surface? a) plane mirrors b) spherical mirrors c) simple mirrors d) None of the above [Answer: (b) spherical mirrors] 2. The spherical mirror with a reflecting surface curved inward is called a) convex mirror

Science : Chapter 2 : Force and Pressure TEXTBOOK EXERCISES I. Choose the best answer. 1. If we apply force against the direction of motion of the body, then the body will a. stop moving b. move with an increased speed c. move with a decreased speed d. move in a different direction [Answer: (a)

Science : Chapter 1 : Measurement TEXTBOOK EXERCISES I. Choose the best answer. 1. Which one the following systems of unit is the British System of unit? a. CGS b. MKS c. FPS d. SI [Answer:(c) FPS] 2. Electric current is a ______quantity a. base b. supplementary c. derived d. professional [Answer:(a) base] 3. SI unit