Chapter Exam

Chapter-5 Measurement of Length and Motion — Online MCQ Test

Q: What is the SI unit of length?

Answer: A. Meter — The SI (International System of Units) unit of length is the meter (m). All other units are either multiples or submultiples of the meter.

Q: Which instrument is used to measure the length of a small object like a pencil?

Answer: B. Ruler — A ruler (typically 30 cm) is the most appropriate instrument for measuring small objects like pencils. Measuring tapes are for longer distances, and odometers measure distance traveled by vehicles.

Q: A student walks 50 meters north, then 30 meters south. What is the total distance covered?

Answer: D. 80 meters — Distance is the total path length traveled regardless of direction. Total distance = 50 + 30 = 80 meters. (Note: Displacement would be 20 meters north.)

SCIENCE · Grade 6 · CBSE(NCERT)

Practice Chapter-5 Measurement of Length and Motion with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 6 SCIENCE. This chapter covers: SI units - measurement - types of motion. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-5 Measurement of Length and Motion — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 6 SCIENCE — Chapter-5 Measurement of Length and Motion, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the SI unit of length?

A. Meter ✓
B. Centimeter
C. Kilometer
D. Millimeter

Answer: A. Meter
The SI (International System of Units) unit of length is the meter (m). All other units are either multiples or submultiples of the meter.

Which instrument is used to measure the length of a small object like a pencil?

A. Measuring tape
B. Ruler ✓
C. Meter scale
D. Odometer

Answer: B. Ruler
A ruler (typically 30 cm) is the most appropriate instrument for measuring small objects like pencils. Measuring tapes are for longer distances, and odometers measure distance traveled by vehicles.

A student walks 50 meters north, then 30 meters south. What is the total distance covered?

A. 20 meters
B. 30 meters
C. 50 meters
D. 80 meters ✓

Answer: D. 80 meters
Distance is the total path length traveled regardless of direction. Total distance = 50 + 30 = 80 meters. (Note: Displacement would be 20 meters north.)

Which statement about distance and displacement is correct?

A. Distance and displacement are always equal
B. Distance is always greater than or equal to displacement ✓
C. Displacement is always greater than distance
D. Distance and displacement are the same thing

Answer: B. Distance is always greater than or equal to displacement
Distance is the total path length traveled, while displacement is the shortest straight-line distance between start and end points. Distance is always ≥ displacement and equals it only for straight-line motion in one direction.

Which statement INCORRECTLY describes the difference between distance and displacement?

A. Distance is a scalar while displacement is a vector
B. Distance can never be less than displacement magnitude ✓
C. Displacement depends only on initial and final positions, not the path taken
D. Distance increases while traveling in any direction, but displacement only increases in a specific direction

Answer: B. Distance can never be less than displacement magnitude
The statement is incorrect because distance can be equal to displacement (when traveling in a straight line in one direction) but distance is always greater than or equal to displacement, not 'never less than.' The wording is ambiguous and technically the statement is false.

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