NCERT solution for class 6 //Science// Chapter 10 Motion and measurement of distances

 NCERT solution > Class 6 > Science 

 Chapter 10  - Motion and measurement of distances 

Exercise 

Q1. Give two examples each of modes of transport used on land water and air? 

Answer

 1. Land transport  - Bus and truck 

2. Water transport - ship and boat  

3. Air transport  - Aeroplane and helicopter 

Q2. Fill in the blanks .

   i)  One  metre is 100 cm  

   ii) 5 km is 5000 metre 

   iii) Motion of a child on a swing is periodic motion. 

  iv) Motion of the needle of a sewing machine is periodic motion 

 v) Motion of wheel of a bicycle is circular motion 

Q3. Why can a pace or a footstep not be used as a standard unit of length ? 

Answer - A pace or a footstep not be used as a standard unit of length because it is different as person to person  .

Q4. 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 . 

Q5. The height of a person is 1.65 m express it into centimetre and millimetre? 

Answer- 

Height of the person is equal to 1.65 m 

1 metre is equal to 100 cm = 1.65 x 100 = 165 cm. 

1 metre is equal to 1000 mm = 1.65 x 1000 = 1650 mm.

Q6. The distance between radha's home and her school is 3250 m . express this distance into km? 

Answer - 

1 km = 1000 m 

Radha's home distance from school is = 3250 m 

3250 / 1000 = 3. 250 m 

Means 3 kilometre  250 metre .

Q7. While measuring the length of a knitting needle the reading of the scale at one end is 3.0 cm and the other end is 33.1 cm what is the length of the needle. 

Answer - 

Length of the needle is = 33.1 -3.0= 30.1 cm. 

Q8. Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on . 

Answer- 

Similarities- Both the things shows the circular motion.

Differences- For the motion of bicycle muscular energy is required and  for the motion of ceiling fan electrical energy is required . .

Q9. Why would you not like to use a measuring tape made of an elastic material like rubber to measure distance what would be some of the problems you would meet in telling someone about a distance you measured with such a tape.  ? 

Answer- we should not use the measuring tape made up of elastic material like rubber because rubber become stretch and due to that the correct measurement is not possible.

Q10. Give two examples of periodic motion ? 

Answer- Motion of sewing machine and Motion of earth around the sun.


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