Students can practice the best Class 7 Science MCQ and Measurement of Time and Motion Class 7 Science Curiosity Chapter 8 MCQ Online Test with Answers for exam preparation.
Class 7 Science Chapter 8 Measurement of Time and Motion MCQ
Measurement of Time and Motion MCQ Class 7
MCQ On Measurement of Time and Motion Class 7
Question 1.
Speedometer in a vehicle shows speed of that moving vehicle in:
(a) km/h
(b) m/h
(c) m/s
(d) cm/min
Answer:
(a) km/h
Question 2.
Which instrument measures time correctly
(a) Sundial
(b) Pendulum clock
(c) Quartz clock
(d) Stop watch
Answer:
(d) Stop watch
Question 3.
Speed of an object in straight line with constant speed is:
(a) Uniform liner motion
(b) Non-uniform linear motion
(c) Both (a) – (b)
(d) None of these
Answer:
(a) Uniform liner motion
Question 4.
Select the incorrect one:
(a) hrs for hour
(b) s for second
(c) min for minute
(d) h for hour
Answer:
(a) hrs for hour
Question 5.
A 24 hour long day was divided into:
(a) 5 equal ghatis
(b) 60 equal ghatis
(c) 80 equal ghatis
(d) 100 equal ghatis
Answer:
(b) 60 equal ghatis
Question 6.
Which one is correct ?
(a) 60 s = 1 min
(b) 60 min = 1 h
(c) Both (a) – (b)
(d) None of these
Answer:
(c) Both (a) – (b)
Question 7.
Pendulum clock was discovered in the year:
(a) 1966
(b) 1566
(c) 1666
(d) 1656
Answer:
(d) 1656
Question 8.
At rest, a pendulum is in its:
(a) higher position
(b) mean position
(c) lower position
(d) upper position
Answer:
(b) mean position
Question 9.
Which device measures time using the position of a shadow?
(a) Hourglass
(b) Water clock
(c) Sundial
(d) Digital clock
Answer:
(c) Sundial
Question 10.
What is the SI unit of time?
(a) Minute
(b) Hour
(c) Second
(d) Millisecond
Answer:
(c) Second
Question 11.
Which device was used in ancient India and sank in 24 minutes?
(a) Hourglass
(b) Pendulum clock
(c) Ghatika-yantra
(d) Candle clock
Answer:
(c) Ghatika-yantra
Question 12.
The pendulum completes one oscillation when:
(a) It swings once in any direction
(b) It completes one to-and-fro motion
(c) It moves and stops
(d) It vibrates rapidly
Answer:
(b) It completes one to-and-fro motion
Question 13.
Which of these does NOT measure time?
(a) Sundial
(b) Water clock
(c) Thermometer
(d) Pendulum clock
Answer:
(c) Thermometer
Question 14.
Who invented the pendulum clock?
(a) Newton
(b) Einstein
(c) Galileo
(d) Huygens
Answer:
(d) Huygens
Question 15.
What determines whether an object is in uniform motion?
(a) Constant speed
(b) Speeding up
(c) Changing direction
(d) Changing size
Answer:
(a) Constant speed
Question 16.
What is the formula to calculate speed?
(a) Speed = Distance × Time
(b) Speed = Time ÷ Distance
(c) Speed = Distance ÷ Time
(d) Speed = Time × Speed
Answer:
(c) Speed = Distance ÷ Time
Question 17.
Which of the following is an example of non-uniform motion?
(a) Car moving at a constant speed
(b) Earth revolving around the Sun
(c) A bus moving in city traffic
(d) A train on a straight track at fixed speed
Answer:
(c) A bus moving in city traffic
Question 18.
What is the function of an odometer in a vehicle?
(a) Measures heat
(b) Measures temperature
(c) Measures speed
(d) Measures distance travelled
Answer:
(d) Measures distance travelled
Question 19.
A pendulum of a fixed length completes an oscillation in the same time. This time is called:
(a) Time shift
(b) Time delay
(c) Time interval
(d) Time period
Answer:
(d) Time period
Question 20.
What kind of timekeeping devices use the vibrations of quartz?
(a) Sundials
(b) Pendulum clocks
(c) Quartz clocks
(d) Hourglasses
Answer:
(c) Quartz clocks
Measurement of Time and Motion Class 7 Assertion Reason Questions
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
1. Assertion (A): In hourglass, time measured on basis of sand flow in one bulb to next one.
Reason (R): Hourglasse is a device to measure smaller interval of time in a day.
Answer:
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
2. Assertion (A): Flow of the water in and out into the vessel was basis of measurement of time.
Reason (R): Water bowl filled in a fixed time then sank too.
Answer:
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
3. Assertion: The time determined in sundial due to change in position of shadow.
Reason: Sunlight cast formed shadow.
Answer:
(c) (A) is true but (R) is false.
4. Assertion: Candle clock have no markings on them.
Reason: Time measured at burning of candle was actual basis.
Answer:
(d) (A) is false but (R) is true.
Measurement of Time and Motion Class 7 Fill in the Blanks
1. Standard unit of time is ________.
Answer:
second (s)
2. S.I. unit of speed is ________.
Answer:
m/s metre per second
3. A bus is moving in constant speed. It is said to be in ________.
Answer:
linear motion (uniform)
4. ________ motion in vehicles gives distance travelled in km.
Answer:
odometer
5. ________displays a vehicle speed in km/h.
Answer:
Speedometer
6. A simple pendulum has a bob suspended to a support by a ________.
Answer:
thread
7. An instrument used in olden times to tell time was ________.
Answer:
sundial
8. ________ is the period between the two events.
Answer:
Time
9. Distance covered by a moving body in a unit time is called ________.
Answer:
speed
10. A candle clock possesses ________ that was indication of passage of time when it was burnt.
Answer:
markings
True or False
Measurement of Time and Motion Class 7 True or False
1. Odometer used in vehicles is used to measure speed of vehicle.
Answer: False
2. Mostly a vehicle travelling on a road travels in non-uniform motion.
Answer: True
3. Time period of a simple pendulum remains constant even for its length is changed.
Answer: True
4. Motion of a pendulum is periodic in its nature.
Answer: True
5. In sundial time is confirmed by position of shadow cast by the object.
Answer: True
6. The water clocks do not use water to measure time.
Answer: False
7. Pendulum clock was invented in 17th centuary.
Answer: True
8. Quartz crystal is used in Quartz clocks.
Answer: True
9. Now ECG machines measure a second’s variations.
Answer: False
10. The speed is total distance covered and divided by total time taken.
Answer: True