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Ncert Solutions for Class 6 Science Motion and Measurement of distances


Ncert Solutions

In this page we have Ncert Solutions for Class 6 Science Motion and Measurement of distances. Hope you like them and do not forget to like , social share and comment at the end of the page.
Question 1
Give two examples each, of modes of transport used on land, water and air.
Answer
On Land
Bicycle, Car, Bus, train
On Water
Ship, Motor boat, Ferry
On Air
Aero plane, Glider, Helicopter

Question 2
Fill in the blanks:


(i) One metre is _____ cm.

(ii) Five kilometre is ____ m. (1 Km = 1000m)

(iii) Motion of a child on a swing is ____.

(iv) Motion of the needle of a sewing machine is ___.

(v) Motion of wheel of a bicycle is___.
Answer
  1. 100
  2. 5000
  3. Periodic Motion       
  4. Periodic Motion
  5. Circular Motion


Question 3
 Why can a pace or a footstep not be used as a standard unit of length?

Answer
 A footstep not be used as a standard unit of length because the size of pace and footstep vary from person to person. This will lead to confusion while measuring the lengths by different persons. So We should use standard units like International System of Units (SI Units).

Question 4
 Arrange the following lengths in their increasing magnitude:
       1 metre, 1 centimetre, 1 kilometre,1 millimetre


Answer
 1 millimetre < 1 centimetre < 1 metre < 1 kilometre
Question 5
 The height of a person is 1.65 m. Express it into cm and mm.
Answer
As 1m = 100cm and 1cm = 10mm
  So we can say that
  1.65 m = 1.65 x 100cm = 165cm
Also, 1.65m = 165cm = 165 x 10mm = 1650 mm
Question 6
 The distance between Radha’ s home and her school is 3250 m. Express this distance into km.
Answer
 Since 1 m = 1 /1000 km
  So 3250m = 3250 / 1000 = 3.250 km
Question 7
 While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and at the other end is 33.1 cm. What is the length of the needle? Answer
 Length of the needle = Final reading - Starting Reading
                                = 33.1 cm - 3.0 cm = 30.1 cm

Question 8
 Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.
Answer
Similarity
Both ceiling fan and bicycle exhibit circular motion.
Difference
Bicycle shows rectilinear motion while ceiling fan does not.
Question 9
Why could you not use an elastic measuring tape to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with an elastic tape?

Answer
  Since the tape is stretchable, its measurements will be inaccurate. Therefore, we cannot use it as measuring tape. While measuring a distance, we need to tell someone how much tape has been stretched which is difficult to measure. It leads to incorrect measurements.

Question 10
 Give two examples of periodic motion.

Answer
 Pendulum, Guitar String

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