Chapter Exam

Chapter 8: Measurement of Time and Motion — Online MCQ Test

Q: Which instrument is used to measure short intervals of time accurately in a science laboratory?

Answer: B. Stopwatch — A stopwatch is used to measure short time intervals accurately, such as the time taken by a toy car to move a certain distance.

Q: What do we call the movement of an object along a fixed path?

Answer: A. Motion — Motion means change in position of an object with time. Movement along a path is one form of motion.

SCIENCE · Grade 7 · CBSE(NCERT)

Practice Chapter 8: Measurement of Time and Motion with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 7 SCIENCE. This chapter covers: Time Motion Speed Distance Stopwatch Clock Distance time graph Uniform motion Non uniform motion Measurement. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 8: Measurement of Time and Motion — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 7 SCIENCE — Chapter 8: Measurement of Time and Motion, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which instrument is used to measure short intervals of time accurately in a science laboratory?

A. Clock
B. Stopwatch ✓
C. Thermometer
D. Balance

Answer: B. Stopwatch
A stopwatch is used to measure short time intervals accurately, such as the time taken by a toy car to move a certain distance.

What do we call the movement of an object along a fixed path?

A. Motion ✓
B. Force
C. Pressure
D. Volume

Answer: A. Motion
Motion means change in position of an object with time. Movement along a path is one form of motion.

Which statement best describes non-uniform motion?

A. Object covers equal distances in equal intervals of time
B. Object remains at rest forever
C. Object covers unequal distances in equal intervals of time ✓
D. Object moves only in a straight line

Answer: C. Object covers unequal distances in equal intervals of time
In non-uniform motion, the speed changes, so the object covers unequal distances in equal intervals of time.

A student says, 'A moving object always has a curved distance-time graph.' Which of the following is correct?

A. The statement is always true
B. The statement is true only for uniform motion
C. The statement is false because uniform motion gives a straight line graph ✓
D. The statement is true only for rest

Answer: C. The statement is false because uniform motion gives a straight line graph
A moving object can have a straight-line graph if it moves with uniform speed. A curved graph usually shows non-uniform motion.

Which option correctly distinguishes a clock from a stopwatch?

A. A clock measures short intervals more accurately than a stopwatch
B. A stopwatch is used to show the current time of day
C. A clock shows time of day, while a stopwatch measures time intervals ✓
D. Both are used only to measure distance

Answer: C. A clock shows time of day, while a stopwatch measures time intervals
A clock tells the time of day, whereas a stopwatch is used to measure the duration of an event.

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