Samacheer Class 6 Science Measurements Book Back Answers & Solutions

1I. Choose the correct answer5 questions

Q.1The girth of a tree can be measured byv

A. Metre scale
B. Metre rod
C. plastic ruler
D. Measuring tape.

Solution

(d) Measuring tape.

Answer:

(d) Measuring tape.

Q.2The conversion of 7 m into cm givesv

A. 70 cm
B. 7 cm
C. 700 cm
D. 7000 cm

Solution

(c) 700 cm
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

(c) 700 cm
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Q.3Quantity that can be measured is called ………v

A. Physical quantity
B. Measurement
C. Unit
D. Motion.

Solution

(b) Measurement

Answer:

(b) Measurement

Q.4Choose the correct onev

A. km > mm > cm > m
B. km> mm> m > cm
C. km>m>cm>mm
D. km > cm > m > mm

Solution

(c) km > m > cm > mm

Answer:

(c) km > m > cm > mm

Q.5While measuring length of an oject using a ruler, the position of your eye should bev

A. Left side of the point.
B. Vertically above the point where the measurement is to be taken.
C. Right side of the point.
D. Anywhere according to one’s convenience.

Solution

(b) Vertically above the point where the measurement is to be taken.

Answer:

(b) Vertically above the point where the measurement is to be taken.

2II. True or false.1 questions

Q.G1We can say that mass an object is 126 kg Length of one’s chest can be measured by using metre scale. Ten millimetres makes one centimetre. A hand span is a reliable measure of length. The SI system of units is accepted everywhere in the world.v

Solution

True
False
True
False
True
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

True
False
True
False
True
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

3III. Fill up the blanks:1 questions

Q.G2SI unit of length is symbolically represented as ……….. 500 gm = …………. kilogram. Distance between Delhi and Chennai can be measured in ………. 1 m = ………. cm. 5 km = ………. m.v

Solution

metre
0.5
Kilometre
100
5000

Answer:

metre
0.5
Kilometre
100
5000

4IV. Analogy1 questions

Q.G3Sugar: Beam Balance, Lime Juice?v

Solution

Graduated cylinders.
Height of a person : Cm: Length of your sharpened pencil lead?
mm
Milk : Volume; vegetables?
Weight

Answer:

Graduated cylinders.
Height of a person : Cm: Length of your sharpened pencil lead?
mm
Milk : Volume; vegetables?
Weight

5VI. Arrange in increasing order of unit1 questions

Q.G41 Metre, 1 Centimetre, 1 Kilometre, and 1 Millimetre.v

Solution

1 Millimetre, 1 Centimetre, 1 Metre, 1 Kilometre.

Answer:

1 Millimetre, 1 Centimetre, 1 Metre, 1 Kilometre.

6VIII. Find the answer for the following questions within the grid:1 questions

Q.G510 -3 is one _______ SI unit of time ______ Cross view of reading for measurement leads to ______ _______ is the one what a clock reads. ______ is the amount of substance present in an object. _______ can be taken to get the final reading of the recordings of different students for a single measurement. ______ is a fundamental quantity. _______ shows the distance covered by an automobile. A tailor use _______ to take measurements to stitch a cloth. Liquids are measured with this physical quantity ______v

Solution

millimeter
Second
Parallax
Time
mass
Accurate
Length
Odometer
tape
litres
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

millimeter
Second
Parallax
Time
mass
Accurate
Length
Odometer
tape
litres
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

7IX. Answer in a word or two.5 questions

Q.1What is the full form of the SI system?v

Solution

An International System of unit

Answer:

An International System of unit

Q.2Name any one instrument used for measuring mass.v

Solution

Beam Balance

Answer:

Beam Balance

Q.3Find the odd one out: Kilogram, Millimetre, Centimetre, Nanometrev

Solution

Kilogram.

Answer:

Kilogram.

Q.4What is the SI unit of mass?v

Solution

Kilogram

Answer:

Kilogram

Q.5What are the two parts present in a measurement?v

Solution

multiple
sub

Answer:

multiple
sub

8X. Answer in a sentence or two:4 questions

Q.1Define measurement.v

Solution

The comparison of an unknown quantity with some known quantity is known as measurement.

Answer:

The comparison of an unknown quantity with some known quantity is known as measurement.

Q.2Define mass.v

Solution

Mass is the measure of the amount of matter in an object.

Answer:

Mass is the measure of the amount of matter in an object.

Q.3The distance between the two places is 43.65 km. convert it into meter and cm.v

Solution

(a) Convert km into metre
1 km = 1000m
∴ 43.65 km = 43.65 × 1000 = 43650.00 = 43650
= 43650 m.
(b) Convert km into cm.
1 km = 1000 m
1 m = 100 cm
1 km = 1000 × 100 cm
1 km = 100000 cm
∴ 43.65 km = 43.65 × 100000 = 4365000.00
= 4365000 cm.
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

(a) Convert km into metre
1 km = 1000m
∴ 43.65 km = 43.65 × 1000 = 43650.00 = 43650
= 43650 m.
(b) Convert km into cm.
1 km = 1000 m
1 m = 100 cm
1 km = 1000 × 100 cm
1 km = 100000 cm
∴ 43.65 km = 43.65 × 100000 = 4365000.00
= 4365000 cm.
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Q.4What are the rules to be followed to make an accurate measurement with scale?v

Solution

Take care to write the correct submultiple.
Always keep the object in parallel to the scale.
Start the measurement from ‘0’ of the scale.

Answer:

Take care to write the correct submultiple.
Always keep the object in parallel to the scale.
Start the measurement from ‘0’ of the scale.

9XI. Solve the following:2 questions

Q.1The distance between your school and your house is 2250 m. Express this distance in kilometre.v

Solution

Distance between school and house is 2250 m.
1000 m = 1 km
∴ 2250 m = 2250 ÷ 1000 = 2.25 km.

Answer:

Distance between school and house is 2250 m.
1000 m = 1 km
∴ 2250 m = 2250 ÷ 1000 = 2.25 km.

Q.2While measuring the length of a sharpened pencil, the reading of the scale at one end is 2.0 cm and at the other end is 12.1 cm. What is the length of the pencil?v

Solution

Sharpened pencil Reading at one end = 2.0 cm.
Sharpened pencil Reading at the other end = 12.1 cm.
Length of the pencil = Difference between two ends.
= 12.1 cm. – 2.0 cm.
= 10.1 cm.

Answer:

Sharpened pencil Reading at one end = 2.0 cm.
Sharpened pencil Reading at the other end = 12.1 cm.
Length of the pencil = Difference between two ends.
= 12.1 cm. – 2.0 cm.
= 10.1 cm.

10XII. Write in detail:1 questions

Q.1Explain two methods that you can use to measure the length of a curved line.v

Solution

Measuring the length of a curved line, by two methods.
First method – using a string.
Draw a curved line AB on the paper.
Place a string along the curved line.
Make sure that the string covers every bit of the curved line.
Mark the points where the curved line begins and ends on the string.
Now stretch the string along the length of a meter scale.
Measure the distance between two markings of the string.
This will give the length of a curved line.
Second method – using a divider.
Draw a curved line AB on a paper.
Separate the legs of the divider by 0.5 cm or 1 cm using a ruler.
Place it on the curved line starting from one end. Mark the position of the other end.
Move it along the line again and again cutting the line into a number of segments of equal lengths.
The remaining parts of the line can be measured using a scale.
Count the number of segments.
Length of the line = (No. of segments × length of each segment) + length of the leftover part.
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

Measuring the length of a curved line, by two methods.
First method – using a string.
Draw a curved line AB on the paper.
Place a string along the curved line.
Make sure that the string covers every bit of the curved line.
Mark the points where the curved line begins and ends on the string.
Now stretch the string along the length of a meter scale.
Measure the distance between two markings of the string.
This will give the length of a curved line.
Second method – using a divider.
Draw a curved line AB on a paper.
Separate the legs of the divider by 0.5 cm or 1 cm using a ruler.
Place it on the curved line starting from one end. Mark the position of the other end.
Move it along the line again and again cutting the line into a number of segments of equal lengths.
The remaining parts of the line can be measured using a scale.
Count the number of segments.
Length of the line = (No. of segments × length of each segment) + length of the leftover part.
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

11I. Choose the best option:2 questions

Q.2The distance between one end and the other end is called _____v

A. mass
B. length
C. time
D. None

Solution

(b) length

Answer:

(b) length

Q.3What is the unit of length?v

A. metre
B. litre
C. second
D. kilogram.

Solution

(a) metre
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

(a) metre
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

12III. Fill in the Blanks.1 questions

Q.G778.75 cm = ______ m ______ cm 1195 m = ______km ______ m 15 cm 10 mm = ______ mm 45 km 33 m = ______ m. The metric system of unit is developed in the year ______ by French.v

Solution

-78 m, 75 cm
-1 km, 195 m
-160 mm
-45033 m
-1790
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

Answer:

-78 m, 75 cm
-1 km, 195 m
-160 mm
-45033 m
-1790
Samacheer Kalvi 6th Science Guide Term 1 Chapter 1 Measurements

13VI. Very Short Answer (2 marks)3 questions

Q.3List the SI units of length, mass, and time.v

Solution

Length is measured by metre (m)
Mass is measured by the kilogram (kg)
Time is measured by second (s).

Answer:

Length is measured by metre (m)
Mass is measured by the kilogram (kg)
Time is measured by second (s).

Q.6What is the clock used to measure the time accurately?v

Solution

Electronic clock
Stop clock

Answer:

Electronic clock
Stop clock

Q.7Hold a sheet paper in one hand and a book in one hand. Which hand feels heavy? Why?v

Solution

The hand, which holds the book, will feel heavy. The mass of the book is more than that of a single sheet of paper. Therefore, the pull on the book is more than that of the paper. Hence our hand has to give more force to hold a book than a paper.

Answer:

The hand, which holds the book, will feel heavy. The mass of the book is more than that of a single sheet of paper. Therefore, the pull on the book is more than that of the paper. Hence our hand has to give more force to hold a book than a paper.