RBSE Class 6 Science Important Questions Chapter 10 Motion and Measurement of Distances

Rajasthan Board  RBSE Class 6 Science Important Questions Chapter 10 Motion and Measurement of Distances Important Questions and Answers.

RBSE Class 6 Science Chapter10 Important Questions Motion and Measurement of Distances

Multiple Choice Questions

Question 1. 
One metre is equal to a millimetre.
(a) 1000 
(b) 100
(c) 10 
(d) 10000
Answer:
(a) 1000 

 

Question 2. 
Which of the following is not an example of periodic motion?
(a) Motion of a pendulum
(b) Motion of swing
(c) Apple falling down
(d) Motion of Earth around and Sun
Answer:
(c) Apple falling down

Question 3. 
Which of the following is a standard unit of measurement?
(a) Foot 
(b) Handspan
(c) Cubit 
(d) Metre
Answer:
(d) Metre

Question 4. 
Motion is the change in the 
(a) speed 
(b) position
(c) distance 
(d) time
Answer:
(b) position

Question 5. 
7 kilometre are equal to:
(a) 7000 m 
(b) 700000 cm
(c) both (a) and (b) 
(d) none of these
Answer:
(c) both (a) and (b) 

Question 6. 
What do we use to measure curve length?
(a) Thread 
(b) Scale
(c) Handspan 
(d) cubit
Answer: 
(a) Thread 

Fill in the Blanks

Question 1. 
Motion is the change in .................. of an object with respect to time.
Answer:
position

Question 2. 
The invention of .................. made great change in the modes of transport.
Answer:
wheels

Question 3. 
Each metre is divided into 100 equal divisions, called .................. 
Answer:
centimetre

Question 4. 
SI unit of length is ..................  
Answer:
metre

Question 5. 
Swinging of .................. our arms is an example of motion.
Answer: 
oscillatory

State whether True or False

Question 1. 
The length of the eraser is measured in millimetres.
Answer:
False

Question 2. 
1 m = 1000 cm. t
Answer:
False

Question 3. 
The invention of the wheel is a great change in modes of transport.
Answer:
True

Question 4. 
S.I. unit of length is metre.
Answer:
True

Question 5. 
March-past of soldiers in a parade is a rectilinear motion.
Answer: 
True

Match the followings

Column I	Column II
1. Rest	(a) circular motion
2. Pendulum of clock	(b) state of moving objects
3. Falling of a stone	(c) measuring tape
4. Handspan	(d) used to measure small length like a length of a box.
5. Blade of a fan	(e) object does not move
6. Centimetre	(f) non-standard unit of length
7. Metre	(g) used to measure curve line
8. Length of table	(h) periodic motion
9. Motion	(i) standard unit of length
10. String	(j) rectilinear motion

Answer:

Column I	Column II
1. Rest	(e) object does not move
2. Pendulum of clock	(h) periodic motion
3. Falling of a stone	(j) rectilinear motion
4. Handspan	(f) non-standard unit of length
5. Blade of a fan	(a) circular motion
6. Centimetre	(d) used to measure small lengths like the length of a box.
7. Metre	(i) standard unit of length
8. Length of table	(c) measuring tape
9. Motion	(b) state of moving objects
10. String	(g) used to measure curve line

Very Short Answer Type Questions 

Question 1. 
Why was wheel invented?
Answer: 
The wheel was invented to make travelling easier. It was a great achievement in the mode of transportation.

Question 2. 
Name some modes of transport. 
Answer: 
Air transport: Aeroplane, spacecraft, etc. Water transport: Submarine, boat, ship, etc. Road transport: Train, bus, car, etc.

Question 3. 
Define handspan, footstep, cubit and arm length.
Answer: 
Handspan: Length between the tip of thumb and little finger. Footstep: It is the distance covered by a step. Cubit: Length from elbow to the tip of the middle finger. Arm length: Length from shoulder to the tip of the middle finger.

Question 4. 
How did ancient people use the string to measure distances less than the length of a string?
Answer: 
They fold the string and mark it into 1/2,1/4 and 1/8 of string length to measure distances less than the length of a string. 

Question 5. 
Is the measurement of a room using the footsteps of different people equal?
Answer: 
No, it is not equal because the footsteps of every person differ according to their size and height.

Question 6. 
Define measurement.
Answer: 
Measurement is defined as a number that shows the size or amount of something which is to be measured.

Question 7. 
How many centimetres are there in 100 metres?
Answer: 
1 metre = 100 centimetres
Therefore, 100 metre = 100 x 100
= 10000 centimetre

Question 8. 
Can you measure length of a box with metre scale?
Answer: 
No, we cannot measure length of a box with metre scale. We need a centimetre scale to measure the length of a box.

Question 9. 
When we stretch a rubber band, what type of motion does it represent? 
Answer:
Oscillatory motion (periodic).

Short Answer Type Questions 

Question 1. 
Which modes of transportation was used in ancient time?
Answer: 
In ancient times, people did not have any means of transport. They used to move on foot or used animals for transportation. Some of the ancient modes of transport that are hardly used these days are camel cart, bullock cart, dog cart, donkey cart, etc.

Question 2. 
How do people know how far they have to travel?
Answer: 
People measure distances by particular standard units of measurement known as SI units. Long distances are measured in kilometres.

Question 3. 
What do you mean by units of measurement?
Answer: 
Units of measurement is a scientifically set of standard units that was invented and accepted all over the world by everyone to measure the physical quantities.

Question 4. 
How many kilometres are there in 200 metres?
\(\begin{aligned} 1 \mathrm{~m} &=\frac{1}{1000} \mathrm{~km} \\ 200 \mathrm{~m} &=\frac{200}{1000} \mathrm{~km} \\ 200 \mathrm{~m} &=0.2 \mathrm{~km} \end{aligned}\)

Question 5. 
How many metres are there in 100 kilometres?
Answer: 
1 km = 1000 m
Therefore, 100 km = 100 x 1000 m
100 km = 100000 m

Question 6. 
How many metres are there in 1000 centimetres?

\(1 \mathrm{~cm}=\frac{1}{100} \mathrm{~m}\)

\(\text { Therefore, } 1000 \mathrm{~cm}=\frac{1000}{100} \mathrm{~m}\)

\(1000 \mathrm{~cm}=10 \mathrm{~m}\)

Question 7. 
Name the device used to measure the following:
Answer: 
Length of a table: Metre scale Our height: Measuring tape Circular fence of a round table: Thread Shoulder length: Measuring tape 

Question 8. 
Name the units used to measure the following:
Answer: 
Distance between Delhi and Jaipur: Kilometre Length of a table: Metre Thickness of a coin: Millimetre Length of a box: Centimetre 

Question 9. 
The distance between Monu’s house and Sonu’s house is 3500 m. Express it in km.
Answer: 
\(1 \mathrm{~m}=\frac{1}{1000} \mathrm{~km}\)
\(\text { Therefore, } 3500 \mathrm{~m}=\frac{3500}{1000} \mathrm{~km}=3.5 \mathrm{~km}\)

Question 10. 
Give two examples each of rectilinear and circular motion.
Answer: 
Rectilinear: March-past of soldiers, boy running on a track.
Circular: Blades of a moving fan, wheels of a moving car.

Long Answer Type Questions

Question 1. 
How the measurement of a quantity is represented?
Answer: 
The measurement of a quantity is expressed in two parts, i.e. magnitude and emit. For example - the length of the room is found to be 58 metres, then 58 is the number and metre is the unit selected for measurement.

Question 2. 
Write the precautions that should be taken while measuring the length.
Answer: 

1. The scale should be placed in contact with objects along its length.
2. If the end of a scale is broken then that reading is supposed to be subtracted by the reading at the ends.
3. The eye should be at the correct position while taking the measurements. Your eye must be exactly in front of the point where the measurement is to be taken.

Question 3. 
Why we cannot measure the curved line directly with a scale?
Answer: 
We cannot measure the curved line or surface with a scale because the curve is not a straight path and a scale is always straight, hence to measure a curved line we need a string or measuring tape.

Question 4. 
Define different types of motions. 
Answer: 

1. Rectilinear motion: When an object moves in a straight line, it is said to be in rectilinear motion.
2. Circular motion: When an object moves such that its distance from a fixed point remains the same or when the object moves in a circular path are called circular motion.
3. Periodic motion: When an object repeats its motion after a fixed interval of time, it is called periodic motion.
4. Rotational motion: Motion in which the whole body of an object moves about its centre of mass is known as rotational motion.

Question 5. 
Name the type of motion in the following:
Answer: 

1. Motion of a ceiling fan: Circular motion
2. Motion of a pendulum: Periodic motion
3. Motion of a falling stone: Rectilinear motion
4. March-past of soldiers: Rectilinear motion
5. Motion of Earth around the Sun: Periodic motion
6. Motion of needle of a sewing machine: Periodic motion.

Question 6. 
Give a one-word answer for the following:
Answer:

1. Motion of a pendulum: periodic
2. State of a stationary object: rest positions
3. Units used to measure small distances: millimetre and centimetre
4. Units used to measure larger distances: kilometre
5. SI unit of length: metre