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Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

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# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.

# Click here to get Complete Study Material For Class 6 Science Chapter 7 - Motion and Measurement of Distances.

# NCERT Solutions :

Class 6 Science Chapter 7 NCERT Solutions are completely based on NCERT Book for Class 6 Science Chapter 7 Motion and Measurement of Distances. These NCERT Solutions for Class 6 Science Chapter 7 Motion and Measurement of Distances contains Answers and detailed explanation of Questions talked about in NCERT Class 6 Science Chapter 7 Motion and Measurement of Distances. Here we suggest you to go through these Class 6th Science Chapter 7 NCERT Solutions thoroughly to strengthen you understanding about this Chapter of Class 6 Science.

NCERT Solutions for Class 6 Science Chapter 7 - Q1.

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

Ans.

On Land : Car, Train

In Water : Boat, Ship

In Air : Airplane, Helicopter

NCERT Solutions for Class 6 Science Chapter 7 - Q2.

Q2. Fill in the blanks:

(a) One meter is 100 cm.

(b) Five kilometer is 5000 m.

(c) Motion of a child on a swing is Oscillatory .

(d) Motion of the needle of a swing machine is Periodic .

(e) Motion of a wheel of a bicycle is Circular .

NCERT Solutions for Class 6 Science Chapter 7 - Q3.

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

Ans. We cannot use pace or a footstep as standard unit of length as the size of foot and the footstep will not be the same for every individual. Thus, the measurement will not be same for different people.

NCERT Solutions for Class 6 Science Chapter 7 - Q4.

Q4. Arrange the following lengths in their increasing magnitude.

(1metre, 1 centimeter, 1 kilometer, 1 millimeter)

Ans. 1 millimeter, 1 centimeter, 1 meter, 1 kilometer.

NCERT Solutions for Class 6 Science Chapter 7 - Q5.

Q5. The height of a person is 1.65 m. express it into cm and mm.

Ans.

1.65 m = 1.65 x 100 cm = 165 cm. (1 m = 100 cm)

1.65 m = 165 cm = 165 x 10 mm = 1650 mm (1cm = 10 mm)

NCERT Solutions for Class 6 Science Chapter 7 - Q6.

Q6. The distance between Radha’s home and her school is 3250 m. express this distance into km.

Ans. 3250 m = 3250/1000 km = 3.250 km (1 m = 1/1000 km)

NCERT Solutions for Class 6 Science Chapter 7 - Q7.

Q7. 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 33.1 cm. What is the length of the needle?

Ans. Length of needle =

= final reading - Initial reading

= 33.1 cm – 3.0 cm

= 30.1 cm.

NCERT Solutions for Class 6 Science Chapter 7 - Q8.

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

Ans.

Similarities : Wheel of a bicycle and ceiling fan both shows circular motion.

Differences : Cycle moves in rectilinear motion but ceiling fan does not move in rectilinear motion.

NCERT Solutions for Class 6 Science Chapter 7 - Q9.

Q9. 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?

Ans. Elastic tap will not give accurate measurement because it stretches in length and reduces in size when not stretched. While telling the measurement taken with an elastic tape. We have to tell whether the tape was stretched and by how much. This is very difficult.

NCERT Solutions for Class 6 Science Chapter 7 - Q10.

Q10. Give two examples of periodic motion.

Ans. Example of periodic motion are :

(a) Pendulum.

(b) Child on the swing.

Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

Which includes :-

# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.

# Click here to get Complete Study Material For Class 6 Science Chapter 7 - Motion and Measurement of Distances.

# Chapter Notes :

Class 6 Science Chapter 7 Motion and Measurement of Distances Notes pdf which includes Class 6 Science Chapter 7 Motion and Measurement of Distances Notes. These Class 6 Science Chapter 7 Notes pdf are completely based on NCERT Book for Class 6 Science Chapter 7 Motion and Measurement of Distances. These notes contains detailed explanation of 6th class science Chapter 7 Motion and Measurement of Distances. I suggest you to go through these Notes to strengthen you understanding about this Chapter of Class 6 Motion and Measurement of Distances.

Class 6 Science Chapter 7 notes.

Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

Which includes :-

# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.

# Click here to get Complete Study Material For Class 6 Science Chapter 7 - Motion and Measurement of Distances.

# Extra Questions :

Class 6 Science Chapter 7 Extra Questions are completely based on NCERT Book for Class 6 Science Chapter 7 Motion and Measurement of Distances. These Extra Questions contains detailed explanation or Definition of some Terms talked about in NCERT Class 6 Science Chapter 7 Motion and Measurement of Distances. You also get some short questions and long questions regarding Chapter 7 Motion and Measurement of Distances of class 6 Science and Some Value Based Questions regarding NCERT Class 6 Science Chapter 7 Motion and Measurement of Distances. Here we suggest you to go through these Class 6th Science Chapter 7 Extra Questions to strengthen you understanding about this Chapter of Class 6 Science.

# Class 6 Science Chapter 7 - Very Short Answer Questions :

Q. Why can hand span and arm length not be used as standard units of length?

Ans. Hand span and Arm length can not be used as standard units of length because these vary from person to person.

Q. Are senses reliable for accurate measurement?

Ans. Our senses are not reliable for accurate measurement.

Q. How many meters are there in 1 km?

Ans. 1000 m.

Q. How many centimeters are there in 1 m?

Ans. 100 cm.

Q. How many millimeters are there in 1 cm?

Ans. 10 mm.

Q. Name the measuring device which can be used for measuring the girth of a tree.

Ans. Measuring tape

Q. Give one example of linear motion.

Ans. Motion of stone falling from a certain height.

Q. Give an example of circular motion.

Ans. Motion of arms of watch.

Q. Name the types of motion in which a body moves along a straight path

Ans. Rectilinear or linear motion.

Class 6 Science Chapter 7 Extra Questions.

Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

Which includes :-

# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.

# Click here to get Complete Study Material For Class 6 Science Chapter 7 - Motion and Measurement of Distances.

# Class 6 Science Chapter 7 - Short Answer Questions :

Q. State two precautions to be observed while measuring length with the help of a meter scale.

Ans. Two precautions are :

(a) The initial point of distance must coincide with the zero reading of meter scale.

(b) The eye should be kept in line with the point of measurement.

Q. How can a measured length be expressed?

Ans. Each measurement has:

(a) A number describing the numerical value.

(b) The unit in which that quantity is measured.

Q. Give the unit for measuring the following :

(a) Distance between Delhi and Jaipur.

(b) Thickness of a coin.

(c) Length of your eraser.

(d) Length of your shoe lace.

Ans.

(a) Kilometer

(b) Millimeter

(c) Centimeter

(d) Centimeter

Q. Name the device used to measure the following :

(a) Size of your shoulder.

(b) Size of your wrist.

(c) Your height.

(d) Your weight.

(e) Cloth for curtain.

(f) Circumference of round table.

Ans.

(a) Measuring tape

(b) Measuring tape

(c) Measuring tape

(d) Weighing balance

(e) Meter scale or measuring tape

(f) A long thread or measuring tape

Q. Give any three examples where meter can be used as the unit of measurement.

Ans.

(a) Length of a pole.

(b) Length of a playground.

(c) Length of a saree

Q. Why do we need an international standard unit of measuring length?

Ans. We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Thus, there should be uniformity in measurement. For the sake of uniformity, we need a common set of units of measurement, which are called standard units.

Q. Differentiate between circular motion and rotational motion.

Ans. In a circular motion, the object just moves in a circle. For example, artificial satellites going around Earth at a constant height. In rotational motion, the object rotates about an axis. For example, Earth rotating on its own axis.

Q. While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.

Ans. When we see the trees from a moving train, their position is changing with respect to us. Hence they appear to be moving. On the other hand the position of co-passengers is not changing with respect to us, hence they appear to be stationary.

Q. How are the motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan different? Explain.

Ans. The motions of a wheel of a moving bicycle and a mark on the blade of a moving electric fan are different as the wheel of a moving bicycle depicts circular as well as rectilinear motion whereas a blade of a moving electric fan shows only circular motion.

Q. Boojho was riding in his bicycle along a straight road. He classified the motion of various parts of the bicycle as

(a) rectilinear motion,

(b) circular motion and

(c) both rectilinear as well as circular motion.

Can you list one part of the bicycle for each type of motion?

Ans. The part of bicycle which show the following motion are :

(a) Handle bar or seat

(b) Pedal

(c) Wheel

Q. Three students measured the length of a corridor and reported their measurements. The values of their measurements were different. What could be the probable reason for this? Mention any three.

Ans. Some of the reasons for difference in their measurement could be:

1. Different measuring devices were used.

2. The end of the corridor may not be easily accessible.

3. The measuring devices may not be standardized.

Class 6 Science Chapter 7 Extra Questions.

Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

Which includes :-

# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.

# Click here to get Complete Study Material For Class 6 Science Chapter 7 - Motion and Measurement of Distances.

# Class 6 Science Chapter 7 - Long Answer Questions :

Q. Why do we need standard unit for measurement?

Ans. We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Thus there should be uniformity in measurement. For the sake of uniformity we need a common set of units of measurement, which are called standard units. Nowadays SI units are used in science and technology almost universally.

Q. Explain how you will measure the length of any curved line?

Ans. A curved line or surface cannot be measured by a straight scale, a measuring tape or thread must be used instead.

# To measure a curved line using a thread, follow the below steps :

a) Tie a knot at one end of the thread.

b) Place the thread at the beginning of the line and try to measure a small initial portion of the line which is relatively straight.

c) Place your thumb at the other end of the measured portion and measure next straighter portion.

d) Repeat the above step till the end of line is reached. Make a knot at the end of the line.

e) Now, straighten the thread and measure the length of the two knots on a scale.

Q. Give two examples for each type of motions :

(a) Linear motion :

Ans.

(i) Rolling of ball on ground

(ii) Moving of bicycle on road

(b) Spinning motion :

(i) Rotating fan

(ii) Wheel of sewing machine

(c) Oscillatory motion :

(i) Pendulum of clock

(ii) Motion of a child on a swing

(d) Periodic motion :

(i) Pendulum of clock

(ii) Motion of a swing, heartbeat

(e) Vibrational motion :

(i) String of a guitar

(ii) Surface of drums

(f) Circular motion :

(i) Rotation of fan

(ii) Bicycle wheel

(g) Random motion :

(i) Motion of football players

(ii) Movement of mosquito

Q. Three students measured the length of a corridor and reported their measurements. The values of their measurements were different. What could be the reason for difference in their measurements?

Ans. Some of the reasons for difference in their measurement could be:

(a) Different measuring devices were used.

(b) The smallest length that could be measured by different devices may be different.

(c) Measurement may not be along the shortest length in all three cases.

(d) The end of the corridor may not be easily accessible.

(e) The measuring devices may be faulty (not standardised)

Q. Name the type of motion ?

(a) The galloping of a horse

Ans. Linear motion.

(b) The needle of a sewing machine

Ans. Periodic motion.

(c) The movements of a mosquito

Ans. Random motion.

(d) The blades of an electric fan

Ans. Circular motion.

(e) The smoke from a lighted dhoopbatti

Ans. Random motion.

(f) Wheels of moving car.

Ans. Linear motion and Rotational motion.

Class 6 Science Chapter 7 Extra Questions.

Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

Which includes :-

# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.

# Click here to get Complete Study Material For Class 6 Science Chapter 7 - Motion and Measurement of Distances.

# Class 6 Science Chapter 7 - Numerical Questions :

Q. A car travels from city A to city B covering a distance of 200 km. It then comes back to city. Calculate the total distance travelled in meters.

Ans. Total distance covered

= 200 + 200 km

= 400 km

= 400 x 1000 m (1 km = 1000 m)

= 4,00,000 m

Q. The height of a person is 20.05 m. Express it in cm and mm.

Ans.

1 m = 100 cm

20.05 m = 20.05 x 100 cm = 2005 cm

1 m = 1000mm

20.05 m = 20.05 x 1000 mm = 20,050 mm

Q. Convert the following :

1. 1 cm = _____ mm

2. 1 dm = _____ m

3. 1 km = _____ m

4. 1 m = _____ cm

Ans.

1. 1 cm = 10 mm

2. 1 dm = 0.1 m

3. 1 km = 1000 m

4. 1 m = 100 cm

Q. Four children measure the length of a table which was about 2 m. Each of them used different ways to measure it.

(i) Sam measured it with a half meter long thread.

(ii) Gurmeet measured it with a 15 cm scale from her geometry box.

(iii) Reena measured it using her hand span.

(iv) Salim measured it using a 5 m long measuring tape.

Which one of them would get the most accurate length? Give reason for your answer.

Ans. Salim would get the most accurate length. The reason is that in this case the length of the table can be measured in one go because the measuring tape is longer than the table. In the other cases the chance of making an error is higher due to multiple measurement. In case of Sam, he can measure the lengths which are exact multiples of half a meter.

Here at MSEducator.in you get Complete FREE Study Material for Class 6 Science Chapter 7 - Motion and Measurement of Distances.

Which includes :-

# Class 6 Science Chapter 7 Explanation.

# Class 6 Science Chapter 7 Extra Questions.

# Class 6 Science Chapter 7 Important Questions.