Selina solutions concise physics class 6 icse Solutions for Chapter 2 physical quantities and measurement

Q1) Write true or false for each statement :

(a) S.I. unit of temperature is fahrenheit.

(b) Every measurement involves wo things – a number and a unit.

(c) Mass is the measure of quantity of matter.

(d) The S.I. unit of time is hour.

(e) The area can be expressed as the product of length of two sides.

Q2) Fill in the blanks .

(a) The S.I. unit of length is _____ of time is _____ of mass is _____ .

(b) ℃ is the unit of__________.

(c) 1 metre tonne = _____ .

(d) The zero mark in Celsius thermometer is the melting pointb of_____ .

(e) The thermometer used to measure the human body is called the _______thermometer.

(f) The normal temperature of human body is _____ ℃ or, _____ °F.

(g) The _____ of an object is measured with the help of a beam balance.

Q3) Match the following columns :

Q4) Select the correct alternative

(a) The symbol of degree celsius is

1. ℃

2. °F

3. K

4. °K

(b) 10mm is equal to

1. 1cm

2. 1m

3. 10dm

4. 10cm

(c) The amount of surface occupied by an object is called its

1. Volume

2. Area

3. Mass

4. Length

(d) A metre ruler is graduated in

1. M

2. Cm

3. Mm

4. Km

(e) A thermometre is graduated in

1. Kelvin

2. °C

3. G

4. Cm

Q1) What is measurement ? How is a measurement expressed ?

Q2) State two characteristics of a unit.

Q3) Name four basic measurements in our daily life .

Q4) What are the S.I. units of

1. mass

2. length

3. time and

4. temperature.

Write their names and symbols.

Q5) Define one metre, the S.I. unit of length. State its one multiple and one sub multiple.

Q6) Convert the following quantities as indicated :

(a) 12inch = ft

(b) 1ft = cm

(c) 20cm = m

(d) 4.2m = cm

(e) 0.2km = m

(f) 0.2cm = mm

(g) 1yard = m

Q7)

(a) Describe in steps how would you measure the length of a pencil using a metre rule. Draw a diagram if necessary.

(b) Explain with an example how you you will use the metre ruler in part (a) if the ends of ruler are broken.

Q8) Name the device which you will use to measure the perimeter of your play ground. Describe in steps how you will use it.

Q9) The diagram below shows a stick placed along a metre RULER. The length of the stick is measured keeping the eye at positions A, B and C.

Q10) Define mass. State its (1) S.I. (2) C.GS and (3) E.P.S units. How are they related ?

Q11) Convert the following quantities as indicated :

(a) 200 kg = ………….metric tonne

(b) 150 kg = ………….quintal

(c) 10lb = …………. kg

(d) 250 g = …………. kg

(e) 0.01 kg = …………. g

(f) 5mg = …………. kg

Q12) Name the instrument which is commonly used to measure the mass of a body. State how is it used ?

Q13) Define one kilogram, the S.I. unit of mass. How is it related to (i) quintal (ii) metric tonne and (iii) gram?

Q14) Name and define the S.I. unit of time. How is it related to (i) minute (ii) hour, (iii) day and (iv) year ?

Q15) Name two devices used to measure the short time interval of an event .

Q16) Express in second

(a) 3 minutes 15 second and

(b) 5 hour 2 minutes 5 second

Q17) What does the temperature measure ?

Q18) Name the

1. S.I. unit and

2. one common unit of temperature. Write their symbols also.

Q19) Name the instrument used for measuring of the temperature of a person. Draw its labelled neat diagram.

Q20) Write the temperature of

1. Melting ice

2. Boiling water

Q21) What is a clinical thermometer ? State its special feature . Draw a labelled neat diagram of a clinical thermometer showing the range of temperature marked on it.

Q22) What is the normal temperature of the human body ? How is it indicated in a clinical thermometer ?

Q23) Can a clinical thermometer be used to measure the temperature of the boiling water ? Give reason for your answer.

Q24) Explain the term ‘area of a surface’ .

Q25) Name the S.I. unit of area and define it.

Q26) How are the units

1. square yard

2. hectare

3. km^2

4. cm^2

5. mm^2 related to the S.I. unit of area ?

Q27 ) Explain how you will measure the area of (i) a square (ii) a leaf ?