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Class 7 Science Chapter 8: Measurement of Time and Motion NCERT Solutions

Q: 1. What are important topics in class 7 science chapter 8?

Class 7 Science Chapter 8: Measurement of Time and Motion focuses on key exam topics to help students score high marks. Important topics include:• Need for measurement of time and motion• Standard units of measurement (SI units)• Instruments used for time and motion, like clocks and stopwatches• Uniform and non-uniform motion• Calculation of speed (Speed = Distance/Time)• Interpretation of simple graphs for motion• Practical examples and applications of measurementFocusing on concepts, definitions, diagrams, and solved exercises will help you prepare thoroughly for CBSE exams.

Q: 2. Are diagrams needed in measurement of time and motion answers?

Including clear and neatly labelled diagrams is highly recommended in Class 7 Science answers, especially when questions ask about instruments or types of motion. Diagrams help you:• Earn extra marks according to the CBSE marking scheme• Clarify explanations, especially for devices like clocks, stopwatches, or speed graphs• Show understanding of motion, such as types of paths (straight, circular, random)Always label all parts, use a pencil and ruler, and keep diagrams neat for the best results.

Q: 3. How do you write definitions in science exams?

Writing clear, precise definitions is crucial for scoring full marks. To write definitions in science exams:• Use the exact textbook wording if possible• Be concise and avoid unnecessary details• Begin with the term, followed by the definition• Underline or highlight key terms like Speed, Motion, Uniform Motion, Measurement, etc.For example: "Motion refers to the change in position of an object over time."Definitions must be accurate and to the point for best results.

Q: 4. How to write stepwise NCERT answers to score full marks?

Following a step-by-step format helps earn full marks as per the CBSE marking scheme for Class 7 Science Chapter 8.• Read the question carefully and underline important keywords• Start your answer with a direct response• Break down explanations into points or steps• Add diagrams or examples when asked• Use bullet points or number your steps• Highlight important definitions or formulae (like Speed = Distance/Time)This approach aligns with how CBSE examiners award marks, so always structure your answer logically and neatly.

Q: 6. How do I structure long answers for better marks?

To score better in long answers, follow these steps as per CBSE guidelines:• Start with a short introduction that states your understanding• Break the main explanation into logical steps or paragraphs• Use headings, bullet points, or numbering• Include important definitions, formulae, and relevant diagrams• Conclude with a summary sentenceThis method makes your answer readable and helps examiners find each marking point.

Q: 7. What are the most important topics from Measurement of Time and Motion in Class 7 Science?

The most important topics from Class 7 Science Chapter 8 for exams are:• Definition and need for measurement• Units of time and motion (SI units)• Types of motion (uniform, non-uniform)• Devices to measure time: clock, stopwatch, sundial• Calculating speed and related numerical questions• Interpreting and drawing simple motion graphsThese areas frequently appear in CBSE tests and should be revised thoroughly.

Q: 8. Is it necessary to memorise formulae and definitions from Class 7 Science Chapter 8?

Yes, memorising key formulae and definitions from Chapter 8 is essential to score well in CBSE exams. Important formulae include:• Speed = Distance / Time• Definitions of motion, speed, time, uniform motion, etc.These are often directly asked or form the basis for numerical problems and short answers.

Q: 9. Do examiners award partial marks for correct steps even if the final answer is wrong?

Yes, CBSE marking scheme gives partial marks for correct steps, even if the final answer is incorrect (especially in calculations or reasoning). To maximise your score:• Show all steps clearly• Write units for every measurement• Use scientific method and reasoningThis is why writing stepwise answers is vital for Class 7 Science Chapter 8.

Q: 10. Where to get chapterwise solutions PDF for offline study?

Chapterwise solutions PDF for Class 7 Science can be downloaded from top educational portals that support the latest CBSE syllabus. Look for a free PDF download option for Class 7 Science NCERT Solutions, and make sure it's updated for the 2025–26 CBSE session for accurate study use.

Exercise-wise Stepwise Answers for Class 7 Science Chapter 8

Need clear NCERT Solutions for Class 7 Science Chapter 8: Measurement of Time and Motion? You're in the right place! Here, you'll find simple, exercise-wise answers designed for the CBSE 2025–26 syllabus, making tough concepts feel easy and approachable.

Get help with step-by-step solutions, important definitions, and exact diagram tips—just what you need to answer every type of question, from short intext to challenging back exercises. These solutions are fully aligned with the CBSE marking scheme for confident exam prep.

Download the free PDF for offline study, learn the proper structure for scoring answers, and avoid common mistakes in your Science paper. Revision tips and marking insights are also included so you study smarter, not harder!

Exercise-wise Stepwise Answers for Class 7 Science Chapter 8

1. Multiple choice questions.

1. Which of the following devices was invented in the seventeenth century and marked a major advancement in mechanical timekeeping?

(a) Sundial
(b) Water clock
(c) Pendulum clock
(d) Candle clock

Answer: (c) Pendulum clock.

2. Answer the following questions in about 30 words.

1. Name three ancient devices used to measure time.

Answer: Three ancient devices used to measure time are sundials, water clocks, and hourglasses. These devices relied on natural events, like the movement of the Sun or the flow of water, to estimate time intervals.

2. What is the SI unit of time and speed?

Answer: The SI unit of time is the second (s). The SI unit of speed is meter per second (m/s). These units help in standardizing measurements of time and speed across the world.

3. What is uniform and non-uniform linear motion?

Answer: Uniform linear motion occurs when an object moves along a straight line with a constant speed. Non-uniform linear motion happens when the speed of the moving object changes along its path.

3. Answer the following questions in about 150 words.

1. Explain how people measured time in the past and how modern timekeeping is more precise.

Answer: In ancient times, people measured time by observing natural phenomena, such as the position of the Sun and the phases of the Moon. Devices like sundials, water clocks, hourglasses, and candle clocks were used to measure smaller intervals. Sundials relied on the shadow cast by the Sun, while water clocks measured time based on the flow of water from one vessel to another. These methods, though innovative, were not highly accurate. The invention of the pendulum clock in the seventeenth century marked a significant advancement as it used the regular swing of a pendulum to keep much more precise time. Modern timekeeping uses electronic gadgets and atomic clocks, which ensure extremely accurate measurements, especially crucial for events like athletic races where even a fraction of a second matters.

4. Match the following.

Questions	Answer
1. Sundial	(C) Shadow of the Sun
2. Water clock	(A) Flow of water
3. Pendulum clock	(D) Swing of pendulum
4. Hourglass	(B) Flow of sand

Understanding Measurement of Time and Motion in Science Class 7

Mastering the Measurement of Time and Motion is essential for building a strong foundation in Class 7 Science. Knowing about devices like pendulum clocks and sundials helps you understand how humans have tracked time through history.

Remember that the SI unit of time is the second and for speed, it is meter per second. Focusing on key concepts like speed and types of motion can make your exam preparation much easier and more effective.

Stay curious like Prerna and practice the exercise questions from NCERT. Regular revision and real-life examples will help you gain confidence and score high marks in Science Chapter 8 for the 2025-26 session.

FAQs on Class 7 Science Chapter 8: Measurement of Time and Motion NCERT Solutions

1. What are important topics in class 7 science chapter 8?

Class 7 Science Chapter 8: Measurement of Time and Motion focuses on key exam topics to help students score high marks. Important topics include:
• Need for measurement of time and motion
• Standard units of measurement (SI units)
• Instruments used for time and motion, like clocks and stopwatches
• Uniform and non-uniform motion
• Calculation of speed (Speed = Distance/Time)
• Interpretation of simple graphs for motion
• Practical examples and applications of measurement
Focusing on concepts, definitions, diagrams, and solved exercises will help you prepare thoroughly for CBSE exams.

2. Are diagrams needed in measurement of time and motion answers?

Including clear and neatly labelled diagrams is highly recommended in Class 7 Science answers, especially when questions ask about instruments or types of motion. Diagrams help you:
• Earn extra marks according to the CBSE marking scheme
• Clarify explanations, especially for devices like clocks, stopwatches, or speed graphs
• Show understanding of motion, such as types of paths (straight, circular, random)
Always label all parts, use a pencil and ruler, and keep diagrams neat for the best results.

3. How do you write definitions in science exams?

Writing clear, precise definitions is crucial for scoring full marks. To write definitions in science exams:
• Use the exact textbook wording if possible
• Be concise and avoid unnecessary details
• Begin with the term, followed by the definition
• Underline or highlight key terms like Speed, Motion, Uniform Motion, Measurement, etc.
For example: "Motion refers to the change in position of an object over time."
Definitions must be accurate and to the point for best results.

4. How to write stepwise NCERT answers to score full marks?

Following a step-by-step format helps earn full marks as per the CBSE marking scheme for Class 7 Science Chapter 8.
• Read the question carefully and underline important keywords
• Start your answer with a direct response
• Break down explanations into points or steps
• Add diagrams or examples when asked
• Use bullet points or number your steps
• Highlight important definitions or formulae (like Speed = Distance/Time)
This approach aligns with how CBSE examiners award marks, so always structure your answer logically and neatly.

5. Where can I download the chapter’s solutions PDF?

You can easily download the NCERT Solutions for Class 7 Science Chapter 8 PDF from trusted educational sites that provide free study resources for CBSE students. Usually, a dedicated download button or link is given at the top or the end of the solutions page. Always check that the PDF matches the CBSE 2025–26 syllabus for reliable preparation.

6. How do I structure long answers for better marks?

To score better in long answers, follow these steps as per CBSE guidelines:
• Start with a short introduction that states your understanding
• Break the main explanation into logical steps or paragraphs
• Use headings, bullet points, or numbering
• Include important definitions, formulae, and relevant diagrams
• Conclude with a summary sentence
This method makes your answer readable and helps examiners find each marking point.

7. What are the most important topics from Measurement of Time and Motion in Class 7 Science?

The most important topics from Class 7 Science Chapter 8 for exams are:
• Definition and need for measurement
• Units of time and motion (SI units)
• Types of motion (uniform, non-uniform)
• Devices to measure time: clock, stopwatch, sundial
• Calculating speed and related numerical questions
• Interpreting and drawing simple motion graphs
These areas frequently appear in CBSE tests and should be revised thoroughly.

8. Is it necessary to memorise formulae and definitions from Class 7 Science Chapter 8?

Yes, memorising key formulae and definitions from Chapter 8 is essential to score well in CBSE exams. Important formulae include:
• Speed = Distance / Time
• Definitions of motion, speed, time, uniform motion, etc.
These are often directly asked or form the basis for numerical problems and short answers.

9. Do examiners award partial marks for correct steps even if the final answer is wrong?

Yes, CBSE marking scheme gives partial marks for correct steps, even if the final answer is incorrect (especially in calculations or reasoning). To maximise your score:
• Show all steps clearly
• Write units for every measurement
• Use scientific method and reasoning
This is why writing stepwise answers is vital for Class 7 Science Chapter 8.

10. Where to get chapterwise solutions PDF for offline study?

Chapterwise solutions PDF for Class 7 Science can be downloaded from top educational portals that support the latest CBSE syllabus. Look for a free PDF download option for Class 7 Science NCERT Solutions, and make sure it's updated for the 2025–26 CBSE session for accurate study use.

11. How do I learn and remember diagrams for Measurement of Time and Motion?

To learn and remember diagrams for Class 7 Science Chapter 8, follow these tips:
• Practice drawing each diagram by hand with labels (e.g., clocks, path of motion)
• Revise diagram-based questions from the NCERT back exercises
• Use flashcards or quick sketches as revision aids
• Label all necessary parts and highlight unique features
Neat diagrams fetch easy marks on CBSE exams.

12. Are NCERT Solutions enough for Class 7 Science exams?

NCERT Solutions are sufficient for most Class 7 Science exams as they cover the entire CBSE syllabus and typical question patterns. For best results:
• Revise all intext and back exercise questions
• Practice writing answers in the NCERT stepwise method
• Supplement with exemplar and previous year questions for higher accuracy
This approach ensures you are well-prepared for all types of questions.