# Motion and Measurement of Distances Class 6th NCERT Solutions

Embarking on the journey of Class 6 Science, especially Chapter 7 - "Motion and Measurement of Distances," opens up a fascinating world of learning for students. This chapter is a cornerstone in understanding the fundamentals of physics in a simple and engaging way. At WitKnowLearn, we aim to make this journey insightful and fun for Class 6 students.

The concept of motion and how to measure distances are key skills in science. Students learn about different types of motion and how they can be observed in our daily life. For instance, the motion of a rolling ball, the flight of a bird, or even the movement of vehicles on the road. These examples help students connect textbook knowledge with real-world observations.

To deepen this understanding, the Class 6 Science Chapter 7 question and answer section is incredibly useful. It not only clarifies doubts but also enhances the students' ability to apply concepts in various scenarios. Additionally, the NCERT PDF for this chapter provides a comprehensive guide, making learning more structured and accessible.

For those who love challenges, the MCQs (Multiple Choice Questions) on Motion and Measurement of Distances provide an excellent way to test knowledge and prepare for exams. These MCQs are crafted to cover all essential aspects of the chapter, ensuring a thorough revision.

The WitKnowLearn platform offers an interactive and student-friendly approach to learning about motion and measurement of distances in Class 6. We focus on making each topic clear and easy to understand, ensuring that every student feels confident and curious about science. So, let's dive into the exciting world of motion and measurement, and discover the wonders of science together!

Motion and Measurement of Distances Class 6

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

Ans: Two examples of modes of transport used on land are buses and wheel carts. Two examples of modes of transport used on water are ships and boats. Two examples of modes of transport used in air are aeroplanes and helicopters.

Q2. Fill in the blank:
One metre is _____ cm.
Ans: One metre is 100 cm.
Q3. Fill in the blank:
Five kilometres is ______ m.
Ans: Five kilometres is 5000m.
Explanation:
1km = 1000m
5km = 1000 × 5 = 5000m
Q4. Fill in the blank:
Motion of a child on a swing is _______.
Ans: Motion of a child on a swing is periodic.
Explanation:
Periodic motion: The motion of a swing repeats itself at a certain time interval. Therefore, it has periodic motion.
Hence, a child on a swing is said to have periodic motion.
Q5. Fill in the blank:
Motion of the needle of a sewing machine is _______.
Ans: Motion of the needle of a sewing machine is periodic.
Explanation:
Periodic motion: The needle of a sewing machine moves up and down repeatedly with a certain time interval. Hence,
it is an example of periodic motion.
Q6. Fill in the blank:
Motion of wheel of a bicycle is __________.
Ans: Motion of the wheel of a bicycle is circular.
Explanation:
Circular motion: The central part of the wheel of a bicycle is attached to a fixed point. The wheel rotates about this
fixed point as the bicycle moves. Hence, the wheel has circular motion.

Q7. Why can a pace or a footstep not be used as a standard unit of length?
Ans: The size of the foot varies from person to person. If footsteps of two persons are used to measure the length respectively, then the two distances may not be equal. Thus, a footstep is not a constant quantity. Hence, it cannot be used as a standard unit of length.

Q8. Arrange the following lengths in their increasing magnitude:
1 metre, 1 centimetre, 1 kilometre,1 millimetre.
Ans: 1cm = 10mm
1m = 100cm = 1000mm
Again, 1km = 1000m = 100000cm = 10000000mm.
Hence, 1mm is smaller than 1cm, 1cm is smaller than 1m, and 1m is smaller than 1km, i.e.
1 millimetre < 1 centimetre < 1 metre < 1 kilometre

Q9. The height of a person is 1.65m. Express this in cm and mm.
Ans: Height of the person = 1.65m
1m = 100cm
1.65m = 100 × 1.65 = 165cm
Hence, the height of the person is 165cm.
Again, 1m = 100cm = 1000mm
Therefore, 1.65m = 1.65 × 10 = 1650mm
Hence, the height of the person is 1650mm.

Q10. The distance between Radha's home and her school is 3250m. Express this distance into km.
Ans: he distance between Radha’s home and her school is 3250m.
1km = 1000m
i.e., 1000m = 1km
3250 = 1/1000 X 3250 = 3.25 Km.

Q11. While measuring the length of a knitting needle, the reading of the scale at one end is 3.0cm and at the other end is 33.1cm. What is the length of the needle?

Ans: Some common characteristics of living things are that they:
1. Require food.
2. Respire and excrete waste material.
3. Respond to stimuli in their environment.
4. Reproduce to maintain their number.
5. Move from one place to another.
6. Grow and die.

Q12. Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.
Ans: Similarities between the motion of a bicycle and a ceiling fan:
1. The blades of a fan and the wheels of a bicycle are fixed at a point.
2. Both have circular motion about their respective fixed points.
Differences between the motion of a bicycle and a ceiling fan:
1. A bicycle has linear motion, whereas the blades of a ceiling fan do not have linear motion.
2. The motion of the blades of a fan is periodic, whereas the motion of a bicycle is rectilinear motion.

Q13. 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?
Ans: An elastic measuring tape is stretchable. It cannot be used to measure distances because the length of the tape may change on stretching. As a result, the measured length would not be correct If you measure the length of an object twice using an elastic tape, then you may get different values of the same length each time. This is because elastic tapes are stretchable.

Q14. Give two examples of periodic motion.
Ans: Examples of periodic motion:
1. Motion of a pendulum: The bob of a pendulum repeats itself at a certain time period. This motion is called periodic motion.

2. Motion of a boy sitting on a swing: The motion of a swing repeats itself at a certain time period. Hence, a boy
sitting on a swing has periodic motion.

FAQs
1. 1. What is Motion?

Motion is the change in position of an object over time. In Class 6, students learn about different types of motion such as linear, circular, and periodic motion.

2. 2. Why is the Measurement of Distances Important?

Measuring distances is crucial to understand the scope and scale of motion. It helps in calculating how far objects move and is essential in daily life, from small measurements to large distances like those in space.

3. 3. What are the Different Units of Measurement?

Distances can be measured in various units such as meters, kilometers, miles, and centimeters. The choice of unit depends on the distance being measured.

4. 4. How Do We Measure Large Distances?

Large distances, like those between planets, are measured using units like light-years or astronomical units. These measurements involve advanced techniques and tools.

5. 5. Can Motion be Measured in More than One Way?

Yes, motion can be measured in terms of distance traveled, speed, velocity, and acceleration. Each of these gives different information about the motion.

6. 6. What are Some Common Tools Used for Measuring Distances?

Common tools include rulers, measuring tapes, odometers, and more sophisticated devices like sonars and lasers for larger distances.

7. 7. How is Time Related to Motion?

Time is a key factor in understanding motion. The speed of an object is determined by how much distance it covers in a given time.

8. 8. Why Do We Study Motion and Measurement in Class 6?

This chapter lays the foundation for understanding basic physics concepts and prepares students for more advanced topics in higher classes.

9. 9. What are Some Examples of Motion in Everyday Life?

Examples include a car moving on a road, a bird flying in the sky, or a child swinging in a park. Observing these helps students relate the concept of motion to real life.

10. 10. Where Can I Find Resources for Further Learning?

For more resources, including detailed explanations and interactive learning tools, students can visit WitKnowLearn. It’s a great platform for enhancing understanding and preparing for school assessments.

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