## [LATEST]$type=sticky$show=home$rm=0$va=0$count=4$va=0

NCERT Solutions for Class 6 Science Chapter 10 - Motion and Measurement of Distances

## NCERT solutions for class 6 science chapter 10 Exercise and Questions

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

Answer: Two examples of modes of transport used on land are cars and bicycles.

Two examples of modes of transport used on the water are submarines and ships.

Two examples of modes of transport used in the air are aeroplanes and helicopters.

2 (i) . Fill in the blanks: One metre is ______________ cm

Answer: One metre is 100 cm.

2 (ii) . Fill in the blanks:

Five kilometre is ______________ m.

Answer: Five kilometres is 5000 m.

2 (iii) . Fill in the blanks:

Motion of a child on a swing is ______________.

Answer: The motion of a child on a swing is periodic .

2 (iv). Fill in the blanks:

Motion of the needle of a sewing machine is ______________.

Answer: Motion of the needle of a sewing machine is periodic .

2 (v). Fill in the blanks:

Motion of wheel of a bicycle is_____________.

Answer: The motion of the wheel of a bicycle is circular .

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

Answer: Footsteps differ from person to person. So we cannot fix it as a standard unit for measurement of length.

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

Therefore 1 mm < 1 cm < 1 m < 1 km.

5. The height of a person is 1.65 m. Express it into cm and mm.

The height of the person in centimetres is 165 cm and in millimetre is 1650 mm.

6 . The distance between Radha's home and her school is 3250 m. Express this distance into km.

The distance between Radha's home and her school is 3.25 km

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?

Reading of the scale at the other end = 33.1 cm.

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

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

Answer: Similarities between the motion of a bicycle and a ceiling fan that has been switched on are:

(i) The blades of the fan and the wheels of the bicycle are in a circular motion.

(ii) The blades of the fan and spokes of the wheels of the bicycle are fixed at a certain point.

Differences between the motion of a bicycle and a ceiling fan that has been switched on are:

(i) The bicycle is in linear motion, unlike the fan.

(ii) The motion of the blades of the fan is periodic whereas that of the cycle is rectilinear.

9 . 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: A measuring tape made of elastic material would be stretchable and while measuring the distance between two points it might get stretched and would give an incorrect measurement.

10 . Give two examples of periodic motion.

Two examples of periodic motion are:

(i) The needle of a sewing machine.

(ii) The blades of a fan which is switched on.

## Want to know more

Please fill in the details below:

Name