g11 chem

Physics and Measurement
Fill in the blank
1.A physical quantity must be expressed with its number and ……….. . 1.unit

1. A unit is a ……….. quantity. 2.standard
2. Mass is a ……..quantity. 3.basic
   4.Area is a ……….quantity. 4.derived
   5.The British system is also called the ……. system. 5.FPS
3. Length , mass and ……. called basic quantities. 6.time
   7.The unit of mass in CGS system is ……….. . 7.gram
   8.We use a ruler for measuring ……….. . 8.length
4. The SI unit of area is the ……… . 9.m2
   10.The unit of length in …….. is the foot. 10.British system
5. The standard of the number 5068 is ………. . 11.5.068 x 2103
   12.Volume is the ………… quantity. 12.derived
6. The unit of time in all system of measurement is the ………. . 13. kilogram
7. The unit of mass in MKS system is ……… . 14.kilogram
   15.The universe has the ………. size. 15.largest
   16.The unit slug is the unid form of …….. system. 17.MKS
8. A watch can be used to measure the ……… . 18.time
9. The mass of a boy is measured by a ……… . 19.balance
10. One metre is equal to …….km. 20.10-3
11. Elementary particles have the ……… size. 21.smallest
    22.The earth can be regarded as a ………. . 22.clock
12. The age of universe is ……… s. 23.2 x 1018
    24…….. is the language of physics. 24.Mathematics
13. There are ……. seconds in one year. 25.3.17 x 107
14. The size of the universe is ……… time larger than that of an elementary particle. 26.1041
15. A 45 mih-1 is equal to …….. fts-1. 27.66
    28.A metre stick is …. than the yard stick. 28.longer
16. One gram is equal to …. kg. 29.10-3
17. Physics is the subject which studies ………. phenomena. 30.natural