Measurement - Standard 6 - Balbharati

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Measurement

Exercise

Q.1 Suggest appropriate words for the following blanks.

(1) The instrument used for measuring temperature is called a thermometer.

(2) The normal temperature of the human body is 37°C.

(3) When measuring distance from a fixed point, that point is called the reference point.

(4) 1 Metre = 100 Centimetres.

(5) In the glass bulb of a thermometer, coloured alcohol is filled.

(6) The SI unit of temperature is Kelvin.


Q.2 Which instrument will you use for the following measurements? State the name of the appropriate instrument.

Ans.

Measurement Instrument
Length of a pencil or pen 15 cm ruler
Your own height Measuring tape
The girth (circumference) of a large tree trunk Flexible measuring tape (tailor's tape)
The thickness of an eraser Vernier caliper

Q.3 Find my pair.

Ans.

Group 'A' Group 'B'
(1) SI unit of length (c) Metre
(2) Unit of temperature used in research experiments (d) Kelvin
(3) Measurement using a hand span (b) Non-standard method of length measurement
(4) Red coloured liquid in thermometer (a) Alcohol

Q.4 Write whether the following statements are True or False.

(a) 1 km = 100 cm. False

(b) If a ruler and a measuring tape are used to measure length, the length of the table will be different. False

(c) Digital thermometer is used to measure the temperature of boiling water in a laboratory. False

(d) Errors in observation can lead to mistakes while recording temperature. True

(e) The accurate temperature of an object can be told just by touching it. False


Q.5 Arrange the following units in the correct order from biggest to smallest.

Ans. 1 km → 1 m → 1 cm → 1 mm


Q.6 What is the smallest length that can be measured using a ruler from a compass box?

Ans. The smallest length that can be measured using a ruler from a compass box is 1 millimetre (1 mm).


Q.7 Which unit will you use while measuring the following?

Ans.

Measurement Unit
(a) Length of a book Centimetre (cm)
(b) Thickness of a key Millimetre (mm)
(c) Distance between Nagpur and Mumbai Kilometre (km)
(d) Length of a cloth Metre (m)

Q.8 Why is there a need of standard measurement tools?

Ans. Earlier, different people used different units and instruments for measurement. As a result, the measurements were not the same everywhere, causing confusion in trade and daily life. Standard measurement tools provide accurate and uniform measurements. Therefore, there is a need for standard measurement tools.


Q.9 Obtain information about the measurements used in earlier days in your area to measure distance, weight and volume.

Ans.

Quantity Earlier Units Used
Distance Hand span (Hasta), Footstep, Cubit (Angul)
Weight Seer, Tola, Maund
Volume Pot, Bowl, Lota, Seer

Note: The traditional units varied from place to place before the introduction of the standard SI system.

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