9th Standard Syllabus & Materials
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Published on: 30/08/2019
Measurement and Measuring Instruments
Download Tamil Nadu 9th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Which among the following is not a device to measure mass?
Spring balance
Beam balance
Physical balance
Digital balance
2.
Distance between Chennai and Kanyakumari can be found in
Kilometres
Metres
Centimetres
Millimetres
3.
1 metric ton is equal to
100 quintals
10 quintals
1/10 quintals
1/100 quintals
4.
Rulers, measuring tapes and metre scales are used to measure
Mass
Weight
Time
Length
5.
A physical balance measures small differences in mass up to ______.
6.
Radius of a thin wire is measured by ________
7.
Thickness of a cricket ball is measured by _______
8.
Convert: 104°F into Celsius scale.
9.
What do you know about pitch of screw gauge?
10.
What is the full form of SI system?
11.
How will you measure the least count of vernier caliper?
12.
What is the measuring unit of the thickness of a plastic carry bag?
13.
Write the need of a standard unit.
14.
Inian and Ezhilan argue about the light year. Inian tells that it is 9.46 × 1015 m and Ezhilan argues that it is 9.46 × 1012 km. Who is right? Justify your answer.
15.
Time
16.
Length
17.
Mass
18.
Temperature
19.
Digital balance
1.
(a)
Spring balance
2.
(a)
Kilometres
3.
(b)
10 quintals
4.
(d)
Length
5.
( )
milligram
6.
( )
Screw gauge
7.
( )
Vernier Caliper
8.
Celsius = (F – 32) × \(\frac{5}{9}\)= (104 - 32) ×\(\frac{5}{9}\) = 72 × \(\frac{5}{9}\) = 40°C.
9.
The pitch of the screw is the distance moved by the tip of the screw for one complete rotation of the head. It is equal to 1 mm in typical screw gauges.
\(\text{Pitch of the screw }=\frac{\text{Distance moved by the Pitch}}{\text{No. of rotations by Head scale}}\)
10.
Full form of SI system is "International system of units"
11.
The value is one smallest main scale division is divided by total number of vernier scale division is called the least count of vernier caliper.
\( \text { Least count } =\frac{\text { The value of one smallest main scale division }}{\text { Totalnumber of vernier scale division }}\)
\( \\ \text { L.C } =\frac{1 \mathrm{~mm}}{10}=0.1 \mathrm{~mm}=0.01 \mathrm{~cm}\)
12.
The measuring unit of the thickness of a plastic carry bag is micron.
13.
i) Standard units give the correct and accurate measurement like length, mass, time etc...
ii) It is not varied from person to person, place to place and object to object. So we need standard unit.
14.
Inian's statement is correct
Because light travels 3 x 108 m in one second total number of second in one
year is equal to 365 x 24 x 60 x 60 = 3.153 x 107 second.
So one light year is = (3.153 x 107) x (3 x 108)
= 9.46 x 1015 m
15.
Digital Clock
16.
Ruler
17.
Beam balance
18.
Thermometer
19.
Gold ornaments
9th Standard Syllabus & Materials
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Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
