Question

51.Substances which larger masses are usually measured in
a) kilograms b) grams c) tones d) metric tones
52. In SI system the unit of area is
a) meter b) square c) meter square d) meter cube
53. The standard unit of time according to SI system is
a) minute b) second c) hour d) day
54. A single system on which all scientists all over the world agree for units of measurement is called
a) SI units b) International System of Units
c) both a and b d) universal system
55. An average speed of an aero plane is equal to
a) 300m/s b)100m/s c)500m/s d) 50m/s
56. Mercury thermometer is used to measure exact
a) time b) length c) temperature d) pressure
57. The most common used instrument to measure lengths in laboratory is a
a) meter ruler b) half meter ruler
c) both a and b d) none
58. Types of balance includes
a) beam balance b) electronic balance
c) both a and b d) natural balance

59. Volume of seashells, pebbles and keys can be measured by
a) measuring cylinder b) displacement method c) Vernier calliper d) measuring flask
60. In old days the methods of measuring were
a) inaccurate b) correct c) accurate d) perfect​

Answer 1

Answer:

51: d) metric tones

52: c) meter square

53: b) second

54: c) both a and b

55: a) 300m/s

56: c) temperature

57: d) none

58: a) beam balance

59 b) displacement method

60 a) inaccurate