NCERT Solutions for Class 6 Chapter 5 Science FREE PDF Download
Measurement is a fundamental aspect of science and daily life, helping us understand and quantify the world around us. In Chapter 5 Measurement of Length and Motion, we explore the basic concepts of measuring length and the different types of motion objects can exhibit. Chapter 5 introduces the International System of Units (SI units), with a focus on the metre as the standard unit for length. It also gives insights into how we measure distances and the various forms of motion that objects can undergo.
Table of Content
Our Class 6 Science NCERT Solutions breaks down the lesson into easy-to-understand explanations, making learning fun and interactive. Students will develop essential language skills with engaging activities and exercises. Check out the revised CBSE Class 6 Science Syllabus and start practising the Science Class 6 Chapter 5.
Glance on Class 6 Science (Curiosity) Chapter 5 Measurement of Length and Motion
SI Units for Measurement:
The standard unit of length is the metre (m).
Conversion factors: 1 kilometre (km) = 1000 metres (m), 1 metre (m) = 100 centimetres (cm), and 1 centimetre (cm) = 10 millimetres (mm).
Reference Point: A reference point is a fixed point used to measure distance from a field object or point.
Types of Motion:
Linear Motion: Motion along a straight path.
Circular Motion: Motion along a circular path.
Oscillatory Motion: Motion that repeats in a to-and-fro manner.
Practical Example: Deepa, a young girl, experiences different methods of measuring length when buying clothes for a new uniform. The chapter highlights her experience of using a metal rod and a flexible measuring tape.
Question 1. Some lengths are given in Column I of the following Table. Some units are given in Column II. Match the lengths with the units suitable for measuring those lengths.
Answer:
Question 2. Read the following statements and mark True (T) or False (F) against each.
(i) The motion of a car moving on a straight road is an example of linear motion.
Answer: True
(ii) Any object that is changing its position concerning a reference point with time is said to be in motion.
Answer: True
(iii) 1 km = 100 cm
Answer: False
Question 3. Which of the following is not a standard unit of measuring length?
(i) millimetre
(ii) centimetre
(iii) kilometre
(iv) handspan
Answer: (iv) handspan
Question 4. Search for the different scales or measuring tapes at your home and school. Find out the smallest value that can be measured using each of these scales. Record your observations in a tabular form.
Answer:
Question 5. Suppose the distance between your school and home is 1.5 km. Express it in metres.
Ans.
∵ 1 km = 1000 metres
∴ 1.5 km = 1.5 × 1000
= 1500 metres
Question 6. Take a tumbler or a bottle. Measure the length of the curved part of the base of the glass or bottle and record it.
Answer: Hint: Use a flexible measuring tape or a piece of string to measure the length of the curved part of the base of the tumbler, then measure the string against a ruler.
Question 7. Measure the height of your friend and express it.
(i) metres
(ii) centimetres and
(iii) millimetres.
Answer:
Hint: Measure the height using a metre scale and express it in:
Metres (e.g., 1.4 m)
Centimetres (e.g., 140 cm)
Millimetres (e.g., 1400 mm)
Question 8. You are given a coin. Estimate how many coins are required to be placed one after the other lengthwise, without leaving any gap between them, to cover the whole length of the chosen side of a notebook. Verify your estimate by measuring the same side of the notebook and the size of the coin using a 15-cm scale.
Answer: Hint: Measure the diameter of the coin and the length of the notebook. Divide the length of the notebook by the diameter of the coin to estimate the number of coins required. Say the diameter of the coin is 2 cm and the length of the notebook is 18 cm. Then \(\frac{18}{2}\) = 9 coins can be placed side to side along the length of the notebook. Verify by placing the coins end-to-end and measuring again.
Question 9. Give two examples each for linear, circular, and oscillatory motion.
Answer:
Linear motion: A car moving on a straight road, an eraser dropping straight down.
Circular motion: A merry-go-round, the motion of a whirling stone tied to a thread.
Oscillatory motion: A swinging pendulum, the motion of a metal strip pressed and released.
Question 10. Observe different objects around you. It is easier to express the lengths of some objects in mm, some in cm, and some in m. Make a list of three objects in each category and enter them in the following Table.
Sizes of objects around us
Answer:
Classify objects by the convenience of measuring in mm, cm, and m:
Question 11. A roller coaster track is made in the shape shown in Fig. A ball starts from point A and escapes through point F. Identify the types of motion of the ball on the rollercoaster and corresponding portions of the track.
Roller Coaster Track
Answer: Portions of the track and corresponding types of motion:
A to B: Linear motion
B to C: Circular motion (loop)
C to D to E: Circular motion
E to F: Linear motion
Question 12. Tasneem wants to make a metre scale by herself. She considers the following materials for it – plywood, paper, cloth, stretchable rubber, and steel. Which of these should she not use and why?
Answer: Tasneem should not use stretchable rubber because it can change length when stretched, leading to inaccurate measurements. Plywood, cloth, paper, and steel are more suitable as they maintain consistent lengths.
Question 13. Think, design, and develop a card game on conversion of units of length to play with your friends.
Answer: Create cards with different lengths and corresponding units (mm, cm, m, km). Each card can have a length in one unit and players must match it to its equivalent in another unit. For example, a card with “100 cm” would match with “1 m”.
Benefits of NCERT Solutions for Class 6 Science Chapter 5 Measurement of Length and Motion
Provides clear explanations of concepts related to length measurement and types of motion, aiding in better comprehension.
Offers detailed, step-by-step solutions to textbook questions, helping students understand the problem-solving process.
Includes additional practice questions to reinforce learning and ensure mastery of the chapter’s topics.
Ensures that all solutions are in line with the NCERT curriculum, keeping students focused on relevant content.
Uses practical examples and illustrations to make abstract concepts more accessible and easier to understand.
Helps clarify difficult concepts through simplified explanations and visual aids, making learning more effective.
Important Study Material Links for Science Chapter 5 Class 6
Conclusion
Chapter 5 Measurement of Length and Motion provides essential insights into how length is measured and the types of motion that objects can exhibit. By understanding SI units and different forms of motion, students can apply these concepts to various real-life situations. Whether measuring cloth or observing motion, these fundamental principles form the basis for more advanced studies in science and everyday applications.
Chapter-wise NCERT Solutions Class 6 Science
After familiarising yourself with the Class 6 Science Chapter 5 Question Answers, you can access comprehensive NCERT Solutions from all Class 6 Science textbook chapters.
Related Important Links for Class 6 Science
Along with this, students can also download additional study materials provided by Vedantu for Science Class 6-
FAQs on NCERT Solutions for Class 6 Science Chapter 5 Measurement of Length and Motion
1. What are NCERT Solutions for Class 6 Science Chapter 5 Measurement of Length and Motion?
NCERT Solutions for Class 6 Science Chapter 5 Measurement of Length and Motion are stepwise, syllabus-aligned answers to all textbook questions, designed to help students practise and understand concepts such as SI units, methods of measuring length, conversion of units, and types of motion as covered in the CBSE 2025–26 curriculum.
2. Which is the standard unit of length in Class 6 Science Chapter 5 NCERT Solutions?
The standard unit of length described in Class 6 Science Chapter 5 is the metre (m), as per the International System of Units (SI).
3. How do NCERT Solutions for Chapter 5 help in converting different units of length?
NCERT Solutions for Class 6 Science Chapter 5 provide practice on converting between millimetres (mm), centimetres (cm), metres (m), and kilometres (km) by offering clear conversion rules, solved examples, and stepwise logic for each type of conversion.
4. What is a reference point and why is it important in measurement, as explained in NCERT Solutions for Class 6 Science Chapter 5?
A reference point is a fixed location or object from which distances are measured. In measurement tasks, setting a reference point ensures accuracy and consistency when finding the distance from one place to another, as described in the NCERT Solutions for this chapter.
5. What are the main types of motion discussed in Class 6 Science Chapter 5 NCERT Solutions?
The main types of motion introduced are:
- Linear motion – motion in a straight line
- Circular motion – motion along a circular path
- Oscillatory motion – motion that repeats to and fro
6. Why should standard units like metre be used for measurement, according to Chapter 5 NCERT Solutions?
Standard units such as the metre are universally accepted, ensuring all measurements are consistent and comparable, which is key for scientific accuracy and communication as explained in Class 6 Science NCERT Solutions.
7. Can you list examples of objects best measured in mm, cm, and m as per the solutions of Chapter 5?
- Millimetres (mm): Thickness of a coin, diameter of a screw
- Centimetres (cm): Length of a pencil, width of a book
- Metres (m): Height of a lamppost, width of a playground
8. According to NCERT Solutions for Class 6 Science Chapter 5, how do you estimate and verify the number of coins required to cover the length of a notebook?
First, measure the diameter of one coin. Then, divide the notebook length by the coin’s diameter for an estimate. To verify, physically align coins edge-to-edge along the notebook and count to confirm the estimation.
9. What practical methods for measuring curved lengths are suggested in Chapter 5 NCERT Solutions?
Use a flexible measuring tape or a piece of string to follow the curve, then straighten the string alongside a ruler to find the actual length. This is particularly useful for circular objects like bottles or tumblers.
10. What materials are NOT suitable for making a metre scale and why, as addressed in the NCERT Solutions?
Stretchable rubber is unsuitable for making a metre scale because it can stretch, leading to inaccurate measurements. Materials like steel, plywood, or sturdy plastic are preferred as they retain exact length.
11. How do NCERT Solutions for Class 6 Science Chapter 5 address common mistakes in unit conversion?
The solutions emphasize:
- Always multiplying or dividing by the correct conversion factor
- Consistently writing units at each calculation step
- Checking whether to convert from a smaller unit to larger (divide) or vice versa (multiply)
12. What if non-standard units (like handspan) are used for measurement as per Class 6 Science NCERT Solutions?
Non-standard units (handspan, cubit, foot) vary from person to person, resulting in inconsistent and unreliable results. Chapter 5 stresses use of standard units like metre for precise, comparable measurements.
13. Explain, as per the solutions, how types of motion can change along a roller coaster path.
On a roller coaster, the ball may travel:
- In linear motion on straight stretches
- In circular motion on loops or bends
- The solution outlines segment-by-segment identification, connecting track shapes to motion types, reinforcing conceptual application.
14. How do NCERT Solutions for Class 6 Science Chapter 5 help in mastering exam-style questions on measurement?
They provide stepwise, CBSE-approved answers for every type of textbook and sample question. Practice with these solutions builds familiarity with exam language and short/long answer formats required in the 2025–26 syllabus.
15. Why is it important to use the correct measuring instrument for a given object, according to the NCERT Solutions for Chapter 5?
Using the appropriate measuring tool (ruler, tape, calliper) ensures measurement accuracy. For example, tiny thicknesses need screw gauges, while room sizes need metre tapes. The solutions stress matching the tool to the size and precision needed for each object.
