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2: Motion
3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 1 - Measurement - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 1 - Measurement")
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Solutions for Chapter 1: Measurement
Below listed, you can find solutions for Chapter 1 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 1 Measurement Exercise [Pages 11 - 12]
Choose the correct answer.
Choose the correct one.
mm< cm < m < km
mm > cm > m > km
km < m < cm < mm
mm > m> cm> km
Rulers, measuring tapes and metre scales are used to measure ______
mass
weight
time
length
1 metric ton is equal to ______.
100 quintals
10 quintals
1/10 quintals
1/100 quintals
Which among the following is not a device to measure mass?
Spring balance
Beam balance
Physical balance
Digital balance
Fill in the blanks.
Metre is the unit of ______.
1 kg of rice is weighed by ______.
Thickness of a cricket ball is measured by ______.
Radius of a thin wire is measured by ______.
A physical balance measures small differences in mass up to ______.
State whether true or false. If false, correct the statement.
The SI unit of electric current is kilogram.
True
False
State whether true or false. If false, correct the statement.
Kilometre is one of the SI units of measurement.
True
False
State whether true or false. If false, correct the statement.
In everyday life, we use the term weight instead of mass.
True
False
State whether true or false. If false, correct the statement.
A physical balance is more sensitive than a beam balance.
True
False
State whether true or false. If false, correct the statement.
One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K.
True
False
State whether true or false. If false, correct the statement.
With the help of vernier caliper we can have an accuracy of 0.1 mm and with screw gauge we can have an accuracy of 0.01 mm.
True
False
Match the following.
| 1. | Length | kelvin |
| 2. | Mass | metre |
| 3. | Time | kilogram |
| 4. | Temperature | second |
Match the following.
| 1. | Screw gauge | Vegetables |
| 2. | Vernier caliper | Coins |
| 3. | Beam balance | Gold ornaments |
| 4. | Digital balance | Cricket ball |
Assertion and reason type questions.
Assertion(A): The scientifically correct expression is “ The mass of the bag is 10 kg”
Reason (R): In everyday life, we use the term weight instead of mass.
Both A and R are true but R is not the correct reason.
Both A and R are true and R is the correct reason.
A is true but R is false.
A is false but R is true.
Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.
Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.
Both A and R are true but R is not the correct reason.
Both A and R are true and R is the correct reason.
A is true but R is false.
A is false but R is true.
Assertion (A): Distance between two celestial bodies is measured in terms of light year.
Reason (R): The distance travelled by the light in one year is one light year.
Both A and R are true but R is not the correct reason.
Both A and R are true and R is the correct reason.
A is true but R is false.
A is false but R is true.
Answer very briefly.
Define measurement.
Define standard unit.
What is the full form of SI system?
Define least count of any device.
What do you know about pitch of screw gauge?
Can you find the diameter of a thin wire of length 2 m using the ruler from your instrument box?
Answer briefly.
Write the rules that are followed in writing the symbols of units in SI system.
Write the need of a standard unit.
Differentiate mass and weight.
How will you measure the least count of vernier caliper?
Answer in detail.
Explain a method to find the thickness of a hollow tea cup.
How will you find the thickness of a one rupee coin?
Numerical Problem.
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 × 10 12 km. Who is right? Justify your answer.
The main scale reading while measuring the thickness of a rubber ball using Vernier caliper is 7 cm and the Vernier scale coincidence is 6. Find the radius of the ball.
Numerical Problem.
Find the thickness of a five rupee coin with the screw gauge, if the pitch scale reading is 1 mm and its head scale coincidence is 68.
Numerical Problem.
Find the mass of an object weighing 98 N
Solutions for 1: Measurement
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 1 - Measurement
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education 1 (Measurement) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Science [English] Class 9 TN Board chapter 1 Measurement are Accuracy in Measurements, Measurements, Physical Quantities, Unit and Its Types, Unit Systems, International System of Units (Si System), Measuring Smaller Distances, Measuring Larger Distances, Measurement of Time, The Temperature and a Thermometer, Scales of Thermometers, Unit Prefixes, Rules and Conventions for Writing SI Units and Their Symbols, Vernier Callipers, Screw Gauge, Devices for Measuring Mass, Measurement of Mass, Concept of Mass and Weight, Measurement of Length.
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