Important Questions Class 6 Science Chapter 10

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

Science teaches us to understand natural events through investigation and observation. Motion and Measurement of Distances is the tenth chapter in the Class 6 Science syllabus. This unit deals with the types of transport, measurements and standard units of measurements, types of motions, etc. Motion is the act of moving or the process of changing a place or position concerning time. Running, jumping, cycling, swimming, eating, playing, and drinking are a few examples of motion. Measurement is the process of determining the amount of an unknown physical quantity using a reference value that is already known. It is the process of finding a substance’s length, size, or quantity. In olden times, people used different body parts such as hand span, cubit (length of forearm), and fathom to measure the length. The pace, yard, and foot are some other units of length based on body parts. Because the length of body parts varies from person to person, these units become unreliable.

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Important Questions Class 6 Science Chapter 10 – With Solutions

Solving Important Questions Class 6 Science Chapter 10 would help the students see where they lack in their preparation and how to fill the knowledge gap. In doing so, they may better prepare for their examinations.

Mentioned below are a few questions and answers from our question bank of Important Questions from Class 6 Science Chapter 10.

Question 1. Organise the following lengths in their increasing magnitude :

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

Answer 1: Ascending order of length:

1 millimetre < 1 centimetre < 1 metre < 1 kilometre.

Question 2. Investigate and find out what kind of scale is used by tailors, cloth merchants, carpenters, and mechanics to measure length.

Answer 2: 

• Plastic metre scale tape is used by tailors.
• Iron/steel metre scales are used by cloth merchants.
• Carpenters utilise both an iron metre scale and a plastic metre tape.

Question 3. While measuring the knitting needle’s length, 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 3:  Length of the needle = 33.1 cm – 3.0 cm = 30.1 cm.

Question 4. Four children measured the length of a table which was found to be about 2 metres. Each of them used different techniques to measure it.

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

(ii) Ana 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 a reason for your answer.

Answer 4: Salim would measure the length with the greatest accuracy because he uses a measuring tape that is 5 m long, which is longer than the table. As a result, he can quickly and accurately measure the length of the table. In contrast, the other situations include more measurements, which increases the possibility of inaccuracy. Sam can only have lengths that are precise multiples of 0.5 metres measured.

Question 5. What is the expansion of the SI unit?

Answer 5: International System of the unit.

Question 6. What is meant by rectilinear motion? Give two examples.

Answer 6: Any motion in which objects move in a straight line is known as rectilinear motion.

Examples: Motion of any vehicle on a straight road, a moving train

Question 7. What type of motion do the following objects exhibit?

(a) the sewing machine’s needle 

(b) the galloping of a horse

(c) the blades of an electric fan

(d) the movements of a mosquito

(e) wheels of a moving car.

(f) the smoke from a lighted dhoopbatti

Answer 7:

(a) The sewing machine’s needle: Periodic motion.

(b) The galloping of a horse: Linear motion.

(c) the blade of an electric fan: Circular motion.

(d) Movement of a mosquito: Random motion.

(e) Wheels of moving car: Linear motion and Rotational motion.

(f) The smoke from a lighted dhoopbatti: Random motion.

Question 8. Why couldn’t you measure the distance using an elastic measuring tape? What problems might you have when telling someone about a distance you measured with elastic tape?

Answer 8: The distance between two points is incorrectly measured using an elastic measuring tape.

Reasons:

(i)The elastic tape length fluctuates and is influenced by the force used to stretch it.

(ii) Even when measured by the same individual using the same elastic tape, measurements could differ by two or three readings.

(iii) The measurement will also differ if various people measure the same distance.

Question 9. Match the events related to motion in column I with the types of motions given in column II.

Answer 9: 

Question 10. Give two examples of each mode of transport used on land, water, and air.

Answer 10: 

• Land – Bus, train, bike
• Water – Boat, ship
• Air – Aeroplane, Helicopter.

Question 11. While travelling on a train, it appears that the trees near the track are moving, whereas the co-passengers appear to be stationary. Explain the reason.

Answer 11: The trees appear to be moving in the opposite direction when we look out the window of a moving train because they are shifting their position with respect to us. Co-passengers, on the other hand, appear to be stationary because their location in relation to us is not moving.

Question 12. Name the two parts that must be mentioned to state the measurement results.

Answer 12: Unit and magnitude are the two parts that must be mentioned to state the measurement results.

Question 13. Why can’t a pace or a footstep be used as a standard unit of length?

Answer 13: A pace or a footstep can not be used as a standard unit of length because the pace or  footstep of each and every person is not equal.

Question 14. Three students determined the length of a corridor and reported their measurements. The values of their measurements were different.

What could be the reason for the difference in their measurements? (Mention any three)

Answer 14: 

They could differ in measurement for a variety of reasons, including

(I) There were many measuring tools employed.

(ii) Various measuring tools may have varying minimum lengths that can be measured.

(iii) The measurement may not be along the shortest length in all three instances.

(iv) It can be difficult to get to the end of the corridor.

(v) The measuring tools may be faulty (not standardised).

Question 15. Four pieces of wooden sticks, A, B, C, and D, are placed along the length of 30 cm long scale, as shown in the figure. Which one of them is 3.4 cm in length?

(a) A

(b) B

(c) C

(d) D

Answer 15:

We can observe from the given figure that stick C is located between 10.4 cm and 7 cm. The length is therefore (10.4 – 7) cm = 3.4 cm.

Question 16. State two precautions which should be taken while using a metre scale to measure the length of an object.

Answer 16:

• Along the object’s length, place the scale in contact with it.
• The eye must be correctly positioned above the place to be measured in order to take an accurate measurement, which is crucial.

Question 17. Mention 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 the curtain.

(f) Circumference of the round table.

Answer 17:

(a) Measuring tape

(b) Measuring tape

(c) Measuring tape

(d) Weighing balance

(e) Metre scale or measuring tape

(f) A long thread or measuring tape.

Question 18. The figure shows a measuring scale which is usually supplied with a geometry box. Which of the following distances cannot be measured with this scale by using it only once?

(a) 0.1m

(b) 0.15 m

(c) 0.2 m

(d) 0.05 m

Answer 18: (c) 0.2 m

Explanation: Since this scale is 0.15 m long, 0.2 m cannot be measured by using it just once.

Question 19. Which of the following does not express a time interval?

(a) A day

(b) A second

(c) A school period

(d) Time of the first bell in the school

Answer 19: (d) Time of the first bell in the school

Explanation: The school’s first bell indicates a single moment in time rather than an interval of time.

Question 20. What are the reasons for recommending the SI system?

Answer 20: Reasons for recommending SI systems include :

• With this method, even very small measurements are achievable.
• It is a standardised unit; therefore, it is accepted universally.
• The calculation is made simple by system interconversions.
• The units are not affected by time or location.

Question 21. The person’s height is 1.65 m. Convert it to cm and mm.

Answer 21: 

(a) 1.65 m

100 cm = 1 m

= 1.65 x 100

= 165 centimetre

(b) 65 x 100 x 10 mm = 1650 mm.

Question 22. Using a thread, how will you find the circumference of a one-rupee coin?

Answer 22: Fix one end of the thread first, then position the coin next to it and roll the thread precisely once around the coin. Then, using a scale, determine the thread’s length to determine the needed coin circumference.

Question 23. Fill in the blanks.

(i) A body repeating its motion after a certain interval of time is in_______ motion.

(ii) Motion of an object or a part of it around a fixed point is known as_______ motion.

(iii) In rectilinear motion, object moves a______ line______.

(iv) SI unit of length is_______.

Answer 23:

(i) periodic

(ii) Circular

(iii) along; straight

(iv) metre

Question 24. Bholu and Golu are playing on the ground. They both begin to run from the same point A in the ground and reach point B at the same time by following the paths marked 1 and 2, respectively, as shown in the figure. Which of the following statements is true for the given situation?

As compared to Golu, Bholu covers a

(a) longer distance but with a lower speed

(b) longer distance with a higher speed

(c) shorter distance with a lower speed

(d) shorter distance with a higher speed.

Answer (b): 

Although Path 1 is longer than Path 2, Golu and Bholu both arrived at Point B at the same time, indicating that Bholu was moving more quickly than Golu.

Question 25. Mention two examples for each of the following motions:

(i) Linear motion

(ii) Spinning motion

(iii) Oscillatory motion

(iv) Periodic motion 

(v) Vibrational motion

(vi) Circular motion

(vii) Random motion

Answer 25:

(i) Linear motion – Free fall of objects, the motion of a cycle on a straight road.

(ii) Spinning motion – Wheels of a Moving Vehicle, rotating fans.

(iii) Oscillatory motion – Motion of a swing, pendulum of a clock.

(iv) Periodic motion – The Earth in its orbit around the Sun, the clock’s pendulum.

(v) Vibrational motion – Movement of string in stringed instruments like Guitar, sitar, etch and movement of a cell phone in vibration mode.

(vi) Circular motion – The Earth revolving around the Sun, rotation of a fan

(vii) Random motion – Motion of football players, clouds in motion.

Question 26. Radha’s house is 3250 metres away from her school. Convert this distance to km.

Answer 26: 1 km = 1000m

3250 m = 3250 / 1000 = 3.250 km

Thus, the distance between Radha’s home and her school is 3.250 km.

Question 27. Give two examples of linear motion.

Answer 27: 

• Motion of a bike on a straight road.
• An athlete running on a straight track.

Question 28. If you are sitting in a moving bus, are you at rest or in motion?

Answer 28: If we are seated in a bus that is moving, our position in relation to the objects inside the bus does not change. We are not moving in accordance with the definition of motion. The bus is moving. In other words, we can also say that we are stationary compared to everything within the bus and in motion compared to outside trees and other buildings.

Question 29. Mention the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.

Answer 29: 

(i) Similarity: Both a ceiling fan and a bicycle wheel display motion on a fixed axis.

(ii) Dissimilarity: A fan does not exhibit rectilinear motion, whereas a bicycle moves forward and executes this motion.

Question 30. Mention the types of motion in which a body moves along a straight path.

Answer 30: Rectilinear or linear motion is the type of motion in which a body moves along a straight path.

Question 31. Give the unit for measuring the following:

       (a) Length of your shoelace.

       (b) Thickness of a coin.

       (c) Length of your eraser.

       (d) Distance between Delhi and Jaipur.

Answer 31: 

(a) Centimetre

(b) Millimetre

(c) Centimetre

(d) Kilometre

Question 32. How can the length of any curved line be determined?

Answer 32: We must use a divider to determine the length of curved lines. Imagine a curved line AB. Open the divider’s legs to a convenient distance, such as 5 mm. At one end of the curving line, place one of the divider’s legs. Add the second leg to the line. Now determine how many times the divider must be moved along the line to completely cover line AB. Some of the line at the end, which is shorter than the separation between the two legs, may be omitted. By adjusting the divider, measure it separately. Multiply the distance between the two legs by the total number of full steps. To this length, add the length of the remaining distance. The length of the entire curved line will be obtained.

Question 33. Define rest and motion.

Answer 33: 

Rest – If a body does not change its position with respect to its surroundings, the body is said to be at rest.

Motion – A body is said to be in motion if it changes its position with respect to its surroundings.

Question 34. Why is the standard unit for measurement necessary?

Answer 34:

To improve the reliability and accuracy of our judgement, we need a standard unit of measurement. For proper dealing, everyone’s measurement should be the same.As a result, the measurement should be consistent. For the sake of uniformity, we require a standardised set of measurement units, known as standard units. Today, practically all fields of research and technology employ SI units.

Question 35. Give two examples of periodic motion.

Answer 35: 

• A swing in motion
• Motion of pendulum clock.

Question 36. What is translatory motion? What are its types?

Answer 36: Translatory motion is a sort of movement in which every portion of the body moves the same distance in a specific amount of time.

Translatory motion is of three types:

(i) Linear motion

(ii) Random motion

(iii) Curvilinear motion.

Benefits of Solving Important Questions Class 6 Science Chapter 10

Solving the Important Questions Class 6 Science Chapter 10 will help students understand the pattern of questions. This will help them to be prepared to answer any questions that they might be asked in the examination.

Below are a few additional benefits if students regularly participate in solving questions from our question bank:

• You can get a sense of the chapter-wise weighting of the marks by solving Important Questions Class 6 Science Chapter 10. You can schedule time for writing and revising the chapters appropriately if you are aware of the chapter-by-chapter weighting.
• You’ll discover that you can answer the questions more quickly after completing Important Questions Class 6 Science Chapter 10 under strict time constraints.
• When you solve Chapter 10 Class 6 Science Important Questions, there is a chance that you will come across familiar questions in the examination. You will be able to respond to the questions more quickly when they are familiar, giving you more time to respond to other queries.
• By solving questions given in our question bank of Class 6 Science Chapter 10 Important Questions, you will get an idea of your weak and strong areas. You will thus be able to assess yourself. You also become quite aware of the errors you make and have the opportunity to make corrections before taking the real test.

Extramarks website has many resources that will help students with their study and exam preparation. Few of them have been given with links below so students can click on those ana access them:

• CBSE Revision Notes
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• CBSE past years’ question papers
• Important formulas