Book Back Question and Answers

Science : Chapter 20 : Reaching the age of Adolescence TEXTBOOK EXERCISES I. Choose the best answer. 1. Adolescence is the period of life between _____________ years of age. a) 10 to 16 b) 11 to 17 c) 11 to 19 d) 11 to 20 [ Answer: (c) 11 to 19] 2. The period at which […]

Science : Chapter 19 : Movements in Animals TEXTBOOK EXERCISES I. Choose the best answer. 1. Which of the following parts of our body help us in movement? (i) Bones (ii) Skin (iii) Muscles (iv) Organs Choose the correct answer from the options below. (a) (i) and (iii) (b) (ii) and (iv) c) (i) and

Science : Chapter 18 : Organisation of Life TEXTBOOK EXERCISES I.  Choose the best answer. 1. _____________ is tough and thick white sheath that protects the inner parts of the eye. a) Sclera b) Conjunctiva c) Cornea d) Iris [Answer: (a) sclera] 2. ______________ cells are specialised cells that can be transformed into any kind

Science : Chapter 17 : Plant Kingdom TEXTBOOK EXERCISES I. Choose the best answer. 1. Solanum trilobatum is the binomial name of Thoothuvalai. The word ‘Solanum’ refers to a) Species b) Genus c) Class d) Orders [Answer: (b) Genus] 2. Floridian starch is a reserve food material of a) Chloroplyceae b) Phaeophyceae c) Rhodophyceae d) Cyanophyceae [Answer:

Science : Chapter 16 : Microorganisms TEXTBOOK EXERCISES I. Choose the best answer. 1. Microorganisms are measured in _______. a) cm  b) mm  c) micron  d) meter. [Answer: (c) micron] 2. _______ shows both living and nonliving characteristics. a) Protozoa  b) Virus c) Bacteria d) Fungi [Answer: (b) virus] 3. ______ is a prokaryotic microorganisms.

Science : Chapter 15 : Chemistry in Everyday Life TEXTBOOK EXERCISES I. Choose the best answer. 1. The chemical mixed with LPG that helps in the detection of its leakage is __________ a. methanol b. ethanol c. camphor d. mercapton [Answer: (d) mercapton] 2. Which is known as syn gas? a. Marsh gas b. Water gas

Science : Chapter 14 : Acids and Bases TEXTBOOK EXERCISES I. Choose the best answer. 1. Acids are ________ in taste. a) sour b) sweet c) bitter d) salty [Answer: (a) sour] 2. Aqueous solutions of _________ conduct electricity. a) acid b) base c) salt d) All of these  [Answer: All the above] 3. In acidic

Science : Chapter 13 : Water TEXTBOOK EXERCISES I. Choose the correct answer. 1. Water changes to ice at a) 0ºC b) 100ºC c) 102ºC d) 98ºC [Answer: (a) 0°C] 2. Solubility of carbon dioxide in water is high when the a) pressure is low b) pressure is high c) temperature is high d) None

Science : Chapter 12 : Atomic Structure TEXTBOOK EXERCISES 1. Choose the best answer. 1. The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of__________ a) reciprocal proportion b) definite proportion c) multiple proportion d) conservation of mass [Answer: (b) definite proportion] 2. Cathode rays are

Science : Chapter 11 : Air TEXTBOOK EXERCISES I. Choose the best answer. 1. Which of the following is true about oxygen? a) Completely burning gas b) Partially burning gas c) Doesn’t support burning d) Supports burning [Answer: (d) Supports burning] 2. Aerated water contains a) air b) oxygen c) carbon dioxide d) nitrogen [Answer: