Last Updated on February 26, 2025 by XAM CONTENT
Hello students, we are providing assertion reason questions for class 6 science. Assertion reason questions are the new question format that is introduced in CBSE board. The resources for assertion reason questions are very less. So, to help students we have created chapterwise assertion reason questions for class 6 science. In this article, you will find assertion reason questions for CBSE Class 6 Science Chapter 5 Measurement of Length and Motion.
New book for CBSE Class 6 Curiosity, Textbook of Science for Grade 6 learners has been published by NCERT as per National Education Policy (NEP) 2020. Curiosity, Textbook of Science for Grade 6, comprises twelve chapters. Through the chapters, learners will embark on a journey that will connect them to the world around and spark curiosity for further exploration.
Chapter | Measurement of Length and Motion |
Type of Questions | Assertion Reason Questions |
Nature of Questions | Competency Based Questions |
Board | CBSE |
Class | 6 |
Subject | Science |
Useful for | Class 6 Studying Students |
Answers provided | Yes |
Difficulty level | Mentioned |
Important Link | Class 6 Science Chapterwise Assertion Reason |
Assertion Reason on Measurement of Length and Motion
Question 1.
Assertion (A): Motion of a sprinter running on a straight track is rectilinear motion.
Reason (R): Rectilinear motion takes place in a fixed direction.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (a) Both (A) and (R) are true and (R) is the correct explanation of (A).
Difficulty Level: Medium
Question 2.
Assertion (A): The objects which move along a straight line are known as rectilinear motion.
Reason (R): The objects which are moving in a circular form are called ‘circular motion’ of that object.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (b) Both A and R are true but R is not the correct explanation of A.
Difficulty Level: Easy
Question 3.
Assertion (A): The movement of all the planets around the sun is circular motion.
Reason (R): Motion of a boy sliding down a slope is circular.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (c) A is true but R is false.
Difficulty Level: Medium
Question 4.
Assertion (A): A branch of a tree moving ‘to and fro’, motion of a child on a swing and strings of a guitar are examples of periodic motion.
Reason (R): The motion in which an object repeats its motion after the same time is known as periodic motion.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (a) Both A and R are true and R is the correct explanation of A.
Difficulty Level: Medium
Question 5.
Assertion (A): When an object moves along a circular path, it is called circular motion.
Reason (R): The movement of the moon around the earth is circular motion.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (b) Both (A) and (R) are true and (R) is not the correct explanation of (A).
Difficulty Level: Hard
Question 6.
Assertion (A): International System of Units (S.I. unit) is now being used.
Reason (R): Cubit, hand span vary from person to person.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (a) Both (A) and (R) are true and (R) is the correct explanation of (A).
Difficulty Level: Easy
Question 7.
Assertion (A): For measuring the length (L) of an object, choose an appropriate device.
Reason (R): We can measure the length (L) of a curved line directly by using a meter scale.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (c) A is true but R is false.
Difficulty Level: Easy
Question 8.
Assertion (A): The unit of any physical quantity which is acceptable to all people as a basic unit is called a standard unit.
Reason (R): SI units are the set of units used to maintain uniformity all over the world.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (b) Both A and R are true but R is not the correct explanation of A.
Difficulty Level: Medium
Question 9.
Assertion (A): When an object moves along a circular path, it is called rectilinear motion.
Reason (R): Rectilinear motion takes place in a fixed direction.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (d) A is false but R is true.
Difficulty Level: Hard
Question 10.
Assertion (A): For measurements, we use the International System of Units.
Reason (R): kg is the SI unit of length.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (c) A is true but R is false.
Difficulty Level: Hard
Also check
- Class 6 Science Chapter 9 Assertion Reason Questions – Methods of Separation in Everyday Life
- Class 6 Science Chapter 8 Assertion Reason Questions – A Journey Through States of Water
- Class 6 Science Chapter 7 Assertion Reason Questions – Temperature and Its Measurement
- Class 6 Science Chapter 6 Assertion Reason Questions – Materials Around Us
- Class 6 Science Chapter 5 Assertion Reason Questions – Measurement of Length and Motion
- Class 6 Science Chapter 4 Assertion Reason Questions – Exploring Magnets
- Class 6 Science Chapter 3 Assertion Reason Questions – Mindful Eating
- Class 6 Science Chapter 2 Assertion Reason Questions – Diversity in the Living World
- Class 6 Science Chapter 1 Assertion Reason Questions – The Wonderful World of Science
- Components of Food Assertion Reason for Class 6 Science
Boost Your Exam Prep: Get assertion reason questions for all subjects (Class 6-12) now!

Frequently Asked Questions (FAQs) on Measurement of Length and Motion Assertion Reason Questions
Q1: What are Assertion-Reason questions in Class 6 Science?
A1: Assertion-Reason questions consist of two statements: an Assertion (A) and a Reason (R). Students must determine whether both statements are true and if the reason correctly explains the assertion.
Q2: How do I answer Assertion-Reason questions correctly?
A2: To answer correctly, follow these steps:
Check if both statements are true.
If both are true, see if the reason logically explains the assertion.
Use the standard answer choices (Both true with explanation, Both true without explanation, A true but R false, A false but R true).
Q3: What is the new Science textbook “Curiosity” for Grade 6 about?
A3: The new textbook “Curiosity” for Grade 6 Science introduces students to the world of scientific exploration and discovery. It focuses on fostering curiosity and encouraging students to ask questions, observe the world around them, and engage in hands-on activities to understand scientific concepts.
Q4: What is the best way to prepare for Assertion-Reason questions?
A4: Strengthen your understanding of concepts by studying NCERT books.
Focus on cause-effect relationships in science topics.
Practice Assertion-Reason questions regularly from worksheets, sample papers, and past exams.
Q5: Are there any online resources or tools available for practicing “Measurement of Length and Motion” assertion reason questions?
A5: We provide assertion reason questions for CBSE Class 6 Science on our website. Students can visit the website and practice sufficient case study questions and prepare for their exams. If you want to practice more assertion reason questions, you can visit physics gurukul website.