NCERT Solutions Class 6 Science
The NCERT Solutions in English Language for Class 6 Science Chapter – 10 (Motion and Measurement of Distances) has been provided here to help the students in solving the questions from this exercise.
Chapter – 10 (Motion and Measurement of Distances)
1. Give two examples each, of modes of transport used on land, water and air.
Answer –
- Transport mode in Land – Car, Bus
- Transport mode in Water – Ship, Boat
- Transport mode in Air – Helicopter, Aeroplane
2. Fill in the blanks:
(a) One metre is ______________ cm.
(b) Five kilometre is ______________ m.
(c) Motion of a child on a swing is ______________.
(d) Motion of the needle of a sewing machine is ______________.
(e) Motion of wheel of a bicycle is______________.
Answer –
(a) One metre is 100 cm.
(b) Five kilometre is 5000 m.
(c) Motion of a child on a swing is periodic.
(d) Motion of the needle of a sewing machine is periodic.
(e) 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 – Pace or a footstep cannot be used as a standard unit of length because it varies from person to person.
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
5. The height of a person is 1.65 m. Express it into cm and mm.
Answer –
1 m = 100 cm.
∴ 1.65 = 165 cm.
1 cm = 10 mm
∴ 165 cm = 1650 mm
Hence the height of a person is 165 cm or 1650 mm.
6. The distance between Radha’s home and her school is 3250 m. Express this distance into km.
Answer –
Distance between Radha’s home and her school = 3250 m
We know that, 1000 m = 1 km
Hence 3250 m = kms = 3.250 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?
Answer – Length of the needle = Final reading – Initial reading
= 33.1 – 3 = 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 – Both the wheels of a bicycle and a ceiling fan execute a circular motion on a fixed axis.
- Differences – Bicycle move in rectilinear motion, but the fan does not move in rectilinear motion.
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 – An elastic measuring tape gives incorrect length of the distance between two points.
Reasons:
1. The length of the elastic tape varies and depends upon the force by which it is stretched.
2. Measurement would vary between 2 or 3 readings even when measured by the same person and by the same elastic tape.
3. Measurement would also vary if different persons measure the same distance.
10. Give two examples of periodic motion.
Answer –
1. Oscillations of a pendulum.
2. Motion of swing/motion of earth round the sun.
NCERT Solutions for Class 6 Science
- Chapter 1 – Food Where Does It Come From
- Chapter 2 – Components of Food
- Chapter 3 – Fibre to Fabric
- Chapter 4 – Sorting Materials Into Groups
- Chapter 5 – Separation of Substances
- Chapter 6 – Changes Around Us
- Chapter 7 – Getting to Know Plants
- Chapter 8 – Body Movements
- Chapter 9 – The Living Organisms and Their Surroundings
- Chapter 11 – Light, Shadows and Reflection
- Chapter 12 – Electricity and Circuits
- Chapter 13 – Fun with Magnets
- Chapter 14 – Water
- Chapter 15 – Air Around Us
- Chapter 16 – Garbage In, Garbage Out
