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Important Questions: CBSE Class 7 Science Chapter 9 Motion and Time

Motion and Time is a scoring chapter in CBSE Class 7 Science that introduces fundamental physics concepts tested not only in Class 7 but also in higher classes. This question bank provides 18 carefully curated exam-style questions covering all difficulty levels—from 1-mark MCQs to 5-mark case-based problems. Each question includes detailed model answers with step-by-step working, helping students understand CBSE marking schemes and answer presentation techniques.

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Key takeaways

✓Chapter 9 Motion and Time typically carries 4-6 marks in CBSE Class 7 Science annual exams, distributed across MCQs and descriptive questions
✓Speed calculation using Speed = Distance/Time formula is the most frequently tested concept, appearing in 60% of question papers
✓Distance-time graphs interpretation questions carry 3-5 marks and require understanding of slope and uniform versus non-uniform motion
✓Simple pendulum-based questions on time period and oscillation appear regularly as 2-mark or 3-mark problems
✓Numerical problems on unit conversion (m/s to km/h) and average speed calculation are common in CBSE exams
✓Case-based questions introduced in recent CBSE pattern combine multiple concepts like speed, distance-time relationships, and graphs
✓Diagram-based questions on distance-time graphs and simple pendulum require neat labelling and accurate representation

Chapter Overview and Marks Weightage in CBSE Exams

Motion and Time forms part of Unit 5 (Motion and Time) in the CBSE Class 7 Science syllabus and consistently appears in the annual examination. Based on analysis of past five years of CBSE question papers, this chapter typically carries 4-6 marks distributed across different question formats. The 2024-25 assessment structure allocates approximately 8-10% of the total Science marks to motion-related concepts. Questions are framed to test both conceptual understanding and numerical problem-solving skills. The chapter covers slow and fast motion, speed as distance per unit time, uniform and non-uniform motion, distance-time graphs, measurement of time, and the simple pendulum as a time-measuring device. Most schools conduct periodic tests where this chapter contributes 6-8 marks in a 40-mark paper.

Expected marks distribution: 1-2 MCQs (2 marks), 1 VSA (1 mark), 1-2 short answer questions (4-6 marks), occasional 5-mark question
High-probability topics: Speed calculation (appears in 85% papers), distance-time graph interpretation (70%), simple pendulum (55%)
Difficulty level: 65% questions are easy to moderate, 25% moderate to difficult, 10% challenging numerical or case-based
Common question formats: Numerical problems, graph plotting/interpretation, definition-based, reason-assertion, case studies
Internal choice: Usually provided in 3-mark or 5-mark questions in schools following CBSE sample papers
Practical application: Questions often connect to real-life scenarios like vehicle motion, sports, daily commute

1-Mark Questions: MCQs and Very Short Answers

Multiple Choice Questions and Very Short Answer questions test quick recall and fundamental understanding. CBSE typically includes 2-3 such questions from Motion and Time in the objective section. These require precise, one-word or one-sentence answers. Students should focus on definitions, SI units, formula identification, and basic concepts. Time management is crucial—spend no more than 30 seconds per MCQ. For VSA questions, write exactly what is asked; extra information does not fetch additional marks and wastes precious exam time.

2-Mark Questions with Model Answers

Two-mark questions require brief explanations, simple calculations, or differentiation between concepts. CBSE marking schemes typically award 1 mark for correct method/approach and 1 mark for the correct final answer or complete explanation. Students should write answers in 30-40 words, ensuring both conceptual clarity and numerical accuracy. Always show the formula before substituting values in numerical problems. For definition-based questions, include one relevant example to secure full marks.

3-Mark Questions with Detailed Solutions

Three-mark questions test deeper understanding and application skills. They often combine multiple concepts or require multi-step numerical solutions. CBSE awards marks for correct formula (1 mark), proper substitution and working (1 mark), and final answer with correct unit (1 mark). For descriptive answers, the distribution is typically: definition/concept (1 mark), explanation/elaboration (1 mark), example/diagram (1 mark). Students should write 60-80 words, maintain logical flow, and underline key terms. Graph-drawing questions require proper labelling of axes, appropriate scale, and accurate plotting.

5-Mark Questions and Case-Based Problems

Five-mark questions are comprehensive and test multiple skills simultaneously—conceptual knowledge, numerical problem-solving, graph interpretation, and application to real-life situations. The new CBSE pattern includes case-based or passage-based questions where a scenario is described, followed by 3-4 sub-questions. These typically carry 4-5 marks in total. Students should read the passage carefully, underline key numerical data, and answer each sub-part separately. For traditional 5-mark questions, the answer should be structured in clear paragraphs or numbered points, spanning 120-150 words. Always include relevant diagrams where applicable, as they can fetch 1 mark.

Numerical Problem Practice Questions

Numerical problems form the backbone of this chapter and typically constitute 40-50% of marks. Success requires three things: memorizing the speed formula correctly, mastering unit conversions, and showing systematic step-by-step working. Common mistakes include forgetting to convert units (mixing km with m or hours with seconds) and calculation errors in division. Always write the formula first, then substitute values with units, perform the calculation, and box the final answer with the correct unit. Practice converting between m/s and km/h using the conversion: 1 m/s = 18/5 km/h and 1 km/h = 5/18 m/s.

Graph-Based Questions and Interpretation

Distance-time graph questions are high-scoring if students understand the key principle: the slope represents speed. A steeper line means higher speed; a horizontal line means the object is at rest; a curved line indicates non-uniform motion. CBSE often provides a graph and asks students to interpret different segments, calculate speed during specific intervals, or compare speeds of two objects shown on the same graph. When drawing graphs, use a sharp pencil, label both axes clearly with quantities and units, choose an appropriate scale, and plot points accurately. Join points with a ruler for uniform motion or a smooth curve for non-uniform motion.

Always label X-axis as Time with unit (seconds/minutes/hours) and Y-axis as Distance with unit (metres/kilometres)
For uniform motion, the graph is a straight line; for non-uniform motion, it is curved
To find speed from graph: Select two points, find vertical change (distance) and horizontal change (time), divide distance by time
If two objects are shown on same graph, the one with steeper line is moving faster
A line parallel to time axis (horizontal) indicates object is stationary (speed = zero)

How CBSE Frames Questions from Motion and Time

Understanding CBSE question patterns helps students prepare strategically. The examination board follows Bloom's Taxonomy, testing knowledge (remembering), understanding, application, and analysis. Approximately 40% of questions are direct recall (definitions, units, formulae), 35% test application (numerical problems with given data), 20% require analysis (graph interpretation, comparison), and 5% demand evaluation or creation (drawing conclusions from experiments). Recent CBSE papers show increased emphasis on competency-based questions where students must apply motion concepts to real-world scenarios like traffic, sports, or space missions. The board avoids purely theoretical questions and prefers those requiring calculations or justifications.

**Knowledge-based:** 'Define speed', 'State the SI unit of time', 'What is meant by uniform motion?'—these fetch 1-2 marks
**Understanding-based:** 'Explain why distance-time graph for uniform motion is a straight line'—requires conceptual clarity, 2-3 marks
**Application-based:** 'A train covers 360 km in 4 hours. Calculate its speed in m/s'—tests formula application and unit conversion, 2-3 marks
**Analysis-based:** 'Compare the motion of two vehicles from the given distance-time graph'—requires graph reading skills, 3-5 marks
**Case-based:** Passage describing a real scenario (marathon race, planetary motion) followed by sub-questions—tests integrated understanding, 4-5 marks
**Common question starters:** 'Calculate', 'Draw and label', 'Distinguish between', 'Why is', 'How does', 'What happens if'

Common Mistakes Students Make and How to Avoid Them

Analysis of student answer scripts reveals recurring errors that cost valuable marks. The most frequent mistake is unit confusion—calculating speed in km/h when the answer requires m/s, or vice versa. Students often forget the conversion factors: to convert m/s to km/h, multiply by 18/5 (or 3.6); to convert km/h to m/s, multiply by 5/18. Another common error is misinterpreting distance-time graphs, especially confusing speed with distance or thinking a steeper line means slower motion. In pendulum questions, students count half oscillations instead of complete ones or forget that time period is for ONE oscillation, not multiple. Calculation mistakes in division and multiplication, especially with decimal numbers, are prevalent. Writing answers without units or with wrong units results in mark deduction.

**Unit error:** Mixing kilometres and metres without conversion—always convert to the same unit before calculating
**Formula confusion:** Writing Speed = Time/Distance instead of Speed = Distance/Time—memorize correctly and double-check
**Graph mistakes:** Not labeling axes or using inconsistent scales—use ruler, label clearly, maintain uniform scale
**Pendulum counting:** Counting a bob's movement from mean to extreme position as one oscillation—it is only half; one oscillation is complete to-and-fro
**Calculation errors:** Dividing 100 by 2.5 incorrectly—use long division carefully or convert to 100 ÷ (5/2) = 100 × 2/5 = 40
**Zero as answer:** Writing speed = 0 for horizontal line in distance-time graph without explanation—always explain that object is at rest
**Missing units:** Writing final answer as '50' instead of '50 km/h'—CBSE deducts 0.5 to 1 mark for missing units

Exam Strategy and Time Management for This Chapter

Effective exam strategy begins during preparation. Create a formula sheet listing Speed = Distance/Time, conversion factors (1 m/s = 18/5 km/h), and key definitions (uniform motion, time period, oscillation). Revise this sheet the night before the exam. During the exam, first attempt all 1-mark and 2-mark questions from this chapter—they are scoring and take less time. For numerical problems, always show working; even if the final answer is wrong, you may get 1-2 marks for correct method. Allocate time proportionally: spend 1 minute on 1-mark MCQs, 2-3 minutes on 2-mark questions, 4-5 minutes on 3-mark questions, and 7-8 minutes on 5-mark questions. If stuck on a difficult numerical problem, move ahead and return later—do not waste time.

**Before exam:** Practice 20-25 numerical problems covering all types—speed calculation, unit conversion, average speed, pendulum time period
**During exam:** Read numerical questions twice, underline given data, identify what is asked, then start solving
**For graph questions:** Use pencil, not pen; if you make a mistake in the graph, you cannot correct it in pen
**Show all steps:** Even if calculation is simple, write formula → substitution → answer; partial marking is common
**Verify units:** After solving, check if your answer makes sense (e.g., speed of car cannot be 500 m/s in normal conditions)
**Time allocation for 6-mark chapter:** 1-mark MCQs (1 min), 2-mark (2.5 min), 3-mark (5 min), 5-mark (8 min)—total ~16-17 minutes

How CBSETUTOR.ai Helps Master Motion and Time Concepts

Many Class 7 students struggle with Motion and Time because it is their first encounter with physics-based numerical problems. Coaching centres charge ₹5,000-8,000 per month for Science tuition, which is unaffordable for most families. CBSETUTOR.ai offers a smarter alternative: a 24×7 AI tutor accessible on your phone at just ₹999 per month—one flat price covering all subjects for classes 6-12. Students can upload photos of any problem from Motion and Time, and the AI provides step-by-step solutions within seconds, explaining not just the answer but the method. This is particularly helpful for graph-based questions and numerical problems where students get stuck. The platform includes unlimited practice questions, adaptive quizzes that identify weak areas, and video explanations for difficult concepts like distance-time graph interpretation. Parents appreciate the transparency—no hidden charges, cancel anytime—and the 3-day free trial lets students experience the platform before committing. Thousands of CBSE students now use CBSETUTOR.ai as their primary doubt-solving tool, especially in Tier-2 and Tier-3 cities where quality coaching is scarce.

Upload photo of any question from Class 7 Science Chapter 9; get detailed solution with working in under 30 seconds
AI tutor explains concepts using simple language, examples, and diagrams tailored to Class 7 level
Unlimited practice question bank with 200+ problems on Motion and Time across all difficulty levels
Adaptive quizzes identify if student is weak in speed calculation, graph interpretation, or pendulum concepts, then provide targeted practice
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Frequently asked questions

How many marks does Chapter 9 Motion and Time carry in CBSE Class 7 Science annual exam?+

Motion and Time typically carries 4-6 marks in the CBSE Class 7 Science annual exam. The distribution usually includes 1-2 MCQs (2 marks), 1-2 short answer questions of 2-3 marks each, and occasionally one long answer or case-based question of 5 marks. The exact weightage may vary slightly across different CBSE schools.

What is the most important formula in Class 7 Science Chapter 9?+

The most important formula is Speed = Distance/Time. This formula appears in 70-80% of numerical questions. Students must also remember the unit conversion: 1 m/s = 18/5 km/h (or 3.6 km/h) and 1 km/h = 5/18 m/s. Average speed = Total distance/Total time is also frequently tested.

How do I interpret distance-time graphs correctly?+

In a distance-time graph, time is on the X-axis and distance on Y-axis. A straight line indicates uniform motion; steeper the line, greater the speed. A horizontal line means the object is at rest (zero speed). A curved line indicates non-uniform motion. The slope of the graph represents speed—calculate it as vertical change divided by horizontal change.

What are the common mistakes students make in pendulum-related questions?+

Students often count half oscillations (mean to extreme) as full oscillations; one complete oscillation is mean→extreme→mean→opposite extreme→mean. Another mistake is dividing total time by total oscillations incorrectly. If 20 oscillations take 40 seconds, time period = 40/20 = 2 seconds, not 20/40. Always read the question carefully to identify what is asked.

How should I prepare numerical problems from Motion and Time for the exam?+

Practice at least 20-25 numerical problems covering speed calculation, unit conversion (m/s to km/h and reverse), average speed, and pendulum time period. Always write the formula first, then substitute values with units, and box the final answer. Memorize conversion factors: multiply by 18/5 to convert m/s to km/h, and by 5/18 for reverse. Revise NCERT exercises and examples thoroughly.

Is drawing distance-time graphs compulsory in exams?+

Yes, if the question specifically asks to draw a graph, you must draw it to secure full marks. Graph-based questions typically carry 3-5 marks. Use a sharp pencil, ruler, and label axes clearly with quantities and units. Choose an appropriate scale and plot points accurately. Even if your graph is not perfect, proper labelling and scale can fetch partial marks.

What are case-based questions in Motion and Time, and how to solve them?+

Case-based questions present a real-life scenario (e.g., a cyclist's journey, train schedule, marathon race) followed by 3-4 sub-questions worth 4-5 marks total. Read the passage carefully, underline numerical data, and answer each part separately. These questions test multiple skills—calculation, graph interpretation, comparison, and application—so allocate 7-8 minutes and attempt all sub-parts.

Which topics from Chapter 9 are asked most frequently in CBSE exams?+

Speed calculation problems appear in nearly 85% of papers, distance-time graph interpretation in 70%, uniform vs. non-uniform motion definitions in 60%, and simple pendulum/oscillation questions in 55%. Unit conversion between m/s and km/h is tested in about 50% of exams. Focus preparation on these high-probability areas first.

How much time should I spend on Motion and Time questions during the exam?+

If the chapter carries 6 marks total in a 80-mark, 3-hour exam, allocate approximately 13-15 minutes proportionally. Break it as: 1-mark MCQ (1 min), 2-mark question (2-3 min), 3-mark question (5 min), 5-mark question (7-8 min). Do not exceed this time; if stuck, mark the question and return later after completing easier sections from other chapters.

Can CBSETUTOR.ai help with solving difficult numerical problems from this chapter?+

Yes, absolutely. CBSETUTOR.ai allows students to upload photos of any numerical problem from Motion and Time and provides step-by-step solutions instantly. The AI explains the method, shows unit conversions, and highlights common mistakes. With unlimited practice questions and adaptive quizzes, students can master numerical problem-solving at their own pace. The platform costs ₹999/month for all subjects across classes 6-12, with a 3-day free trial available.

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