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CLASS - 6 SCIENCE CHAPTER - 10 MOTION AND MEASUREMENT OF DISTANCESQUESTIONS AND ANSWERS

Question no. 1


Give two examples each, of Modes of transport used on land, water and air.

Answer no. 1


Mode of transport on land - Train,bus
Mode of transport on water - Ship,boat
Mode of transport in air - Helicopter,aeroplane

Question no. 2


Fill in the blanks:

 (i) One metre is __________ cm.
(ii) Five kilometre is __________ m.
(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 no. 2


(i) 100
(ii) 5000
(iii) Periodic
(iv) Periodic
(v) Circular

Question no. 3


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

Answer no. 3


Pace or a footstep cannot be used as a standard unit of length because it differs from person to person.

Question no. 4


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

Answer no. 4


1 millimetre, 1 centimetre,1 metre,1 kilometre.

Question no. 5


The height of a person is 1.65. Express it into centimetre and millimetre.

Answer no. 5


Since 1 metre = 100
so 1.65 metre = 1.65x 100
                              = 165 centimetre

Question no. 6


The distance between Radha home and her school is 3250 metre. Express this distance into kilometre.

Answer no. 6


Since 1 km = 1000 metre
                                         
So 3250 metre = 3250 divided by 1000 = 3.25 kilometre

Question no. 7


While measuring the length of a knitting needle, the reading on the scale at one end is 3.0 and at the other end is 33.1. What is the length of the needle?

Answer no. 7 


Starting point of length = 3.0 centimetre
End point of length = 33.1 centimetre

 So, length of needle = 33.1 - 3 = 30.1 centimetre

Question no. 8


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

Answer no. 8


Similarities - both show circular motion
Differences - bicycle wheels move in rectilinear motion while fan does not move in rectilinear motion.

Question no. 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 no. 9


An elastic measuring tape will not show accurate measurement as its length may very because of having elastic property. When we take measurement with elastic tape, we have to tell whether the tape was stretch or not. If yes then how much it was stretched. Hence it is very difficult to tell the measurement taken from elastic tape is accurate.

Question no. 10


Give two examples of periodic motion.

Answer no. 10


1. Needle of a sewing machine.
2. Pendulum

 Also see answers of the following chapters -

Garbage in Garbage out
Air around us
Water
Fun with Magnets
Electricity and Circuits
Light, Shadow and Reflection
Motion and Measurement of Distances
The Living Organisms and their Surroundings
Body Movements
Getting to know Plants
Changes Around Us
Separation of Substances
Sorting Material into Groups
Fibre to Fabric
Components of Food
Food : Where does it com from ?

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