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Monday, 31 May 2021

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 1 Measurements Text Book Back Questions and Answers




Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 1 Measurements

Samacheer Kalvi 6th Science Measurements Text Book Back Questions and Answers

 

BOOK EXERCISE
I. Choose the correct answer

Question 1.
The height of a tree can be measured by
(a) Metre scale
(b) Metre rod
(c) plastic ruler
(d)Measuring tape.

Answer:
(d) Measuring tape.

Question 2.
The conversion of 7 m into cm gives
(a) 70 cm
(b) 7 cm
(c) 700 cm
(d) 7000 cm

Answer:
(c) 700 cm

Question 3.
Quantity that can be measured is called ………
(a) Physical quantity
(b) Measurement
(c) Unit
(d) Motion.

Answer:
(b) Measurement

Question 4.
Choose the correct one
(a) km > mm > cm > m
(b) km> mm> m > cm
(c) km>m>cm>mm
(d) km > cm > m > mm

Answer:
(c) km > m > cm > mm

Question 5.
While measuring length of an oject using a ruler, the position of your eye should be
(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.

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

II. True or false.

We can say that mass an object is 126 kg True

Length of one’s chest can be measured by using metre scale. False

Ten millimetres makes one centimetre. True

A hand span is a reliable measure of length. False

The SI system of units is accepted everywhere in the world. True

III. Fill up the blanks:

1. SI unit of length is symbolically represented as ……….. Metre

2. 500 gm = …0.5. kilogram.

3. Distance between Delhi and Chennai can be measured in …Kilometre

4. 1 m = …100 cm.

5. 5 km = …5000. m.

IV. Analogy

Sugar: Beam Balance, Lime Juice?

Answer:
Graduated cylinders.

Height of a person: Cm: Length of your sharpened pencil lead?

Answer:
mm

Milk: Volume; vegetables?

Answer:
Weight

V . Match the following .

1.  Length of the fore arm   a. metre

2. SI unit of length   b. second

3. Nano  c. 103

4. SI Unit of time   d. 10-9

5. Kilo   e. Cubit

V . Match the following .

1.  Length of the fore arm   a. cubit

2. SI unit of length   b. metre

3. Nano  c. 10-9

4. SI Unit of time   d. second

5. Kilo   e. 103

VI. Arrange in increasing order of unit

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

Answer:
1 Millimetre, 1 Centimetre, 1 Metre, 1 Kilometre.

IX. Answer in a word or two.

Question 1.
What is the full form of the SI system?

Answer:
An International System of unit

Question 2.
Name any one instrument used for measuring mass.

Answer:
Beam Balance

Question 3.
Find the odd one out: Kilogram, Millimetre, Centimetre, Nanometre

Answer:
Kilogram.

Question 4.
What is the SI unit of mass?

Answer:
Kilogram

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

Answer:

multiple

sub

VIII .  Find the answer for the  following

questions within the grid .

1. 103   is one  millimetre   

2. SI Unit of time is Second

3. Cross view of reading a measurement leads to parallax       

4.Time is the one what a clock reads.

5.  Mass      is the amount of substance present in an object.

6. Accurate    can be taken to get the final reading of the recordings of different students for a single measurement.

7.   Length     is a fundamental  quantity.

8.  Odometer      shows the distance covered by an automobile

9. A tailor uses tape       to take measurements to stitch the cloth.

10. Liquids are measured with this physical quantity. Litre

IX. Answer briefly.

1.Define measurement.

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

2. Define mass.

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

3. The distance between two places is 43.65 km. Convert it into metre and cm.

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.

4. What are the rules to be followed to make accurate measurement with 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.

XI. Solve the following:

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

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

Question 2.
While 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?

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.

XII. Write in detail:

Question 1.
Explain two methods that you can use to measure the length of a curved line.
Answer:
Measuring the length of a curved line  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.




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