# Class 7 Science Chapter 13 MCQ

Class 7 Science Chapter 13 MCQ (Multiple Choice Questions) of Motion and Time updated for new academic session 2021-2022. As all knows that MCQs are now an important part of question papers recommended by CBSE.

That is why, we have prepared the MCQ based on all the topic of the chapter 13 of class 7 science. Practice these questions for not only to score good marks but to understand the concepts also.

## Class 7 Science Chapter 13 MCQ for 2021-2022

 Class: 7 Science Chapter: 13 Motion and Time Contents: MCQ with answers and Explanation

### MCQ Tests with Answers for Class 7 Science Chapter 13

Q1

#### Payel is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Payel wants to take help from you:

[A]. When an object moves along a straight-line path, it is called rectilinear motion.
[B]. When an object moves along a circular path, it is called circular motion.
[C]. When an object turns or spins about a fixed axis, it is called rotational motion.
[D]. The motion which repeats itself after regular intervals of time, is called oscillatory motion.
Q2

#### Read the following sentences carefully, and choose the incorrect one:

[A]. The distance moved by an object in a unit time is called speed of the object.
[B]. A slow-moving object is said to have a low speed.
[C]. A fast-moving object is said to have high speed.
[D]. None of the above
Q3

[A]. 0.6 m/s
[B]. 10 m/s [C]
[C]. 5.4 m/s
[D]. 3.6 m/s
Q4

#### Recently, in a science class test, you are asked a question where you have to say whether the statements are incorrect?

[A]. When the distance travelled is measured in meters and the time taken is measured in seconds then the speed will come in the unit of meters per second.
[B]. When the distance travelled is measured in meters and the time taken is measured in minutes then the speed will come in the unit of meters per minute.
[C]. When the distance is measured in centimeters and the time is measured in seconds then the speed will come in the unit of centimeters per second.
[D]. None of the above
Q5

#### If we denote speed by S, distance by D and time by T, the relationship between these quantities is:

[A]. S = D x T
[B]. T = S/D
[C]. S = 1 x D/ T
[D]. S = T/D

Q6

#### In a science quiz competition, Payel are asked a question where she had to choose the statement which was/were correct?

[A]. If we have to compare the speeds of a number of objects, then we must express the speed of all those objects in the same units.
[B]. An instrument on a vehicle dashboard which indicates the speed of the vehicle when it is running is called speedometer.
[C]. An odometer it is an instrument for measuring the distance travelled by a vehicle.
[D]. All the above
Q7

[A]. 1.6 s
[B]. 2.6 s
[C]. 3.6 s
[D]. 4.8 s
Q8

#### Which of the following statement is or are incorrect?

[A]. An object moving along a straight-line path is said to have uniform motion if its speed remains constant.
[B]. An object moves moving along a straight-line path is said to have non uniform motion if its speed keeps changing.
[C]. The non-uniform motion (in which the speed of an object keeps changing) is also called accelerated motion.
[D]. None of the above
Q9

#### Consider the following statements and choose the incorrect one:

[A]. The distance time graph of an object moving with a uniform speed or constant speed is a straight line.
[B]. The Slope of a distance-time graph indicates the speed of the object.
[C]. The distance time graph for an object moving with non-uniform speed is a curved line.
[D]. When the distance travelled is measured in kilometers and the time taken is measured in hours then the speed will come in the unit of meter per hour.
Q10

[A]. 36 km/h
[B]. 46 km/h
[C]. 76 km/h
[D]. 60 km/h

Q11

#### Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. The principle of periodic motion is used for the measurement of time.
[B]. Clocks and watches which are used for measuring time are based on the principle of periodic motion.
[C]. The to-and-fro motion of a simple pendulum is an example of periodic motion or oscillatory motion.
[D]. All the above
Q12

#### In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. Very accurate measurement of time is now possible by using quartz clocks and watches.
[B]. The smallest time interval that can be measured with commonly available clocks and watches is 1 second.
[C]. The clocks and watches used in sports meets can measure time intervals that are one-tenth of a second or one-hundredth of a second.
[D]. None of the above
Q13

#### Which of the following cannot be used for the measurement of time?

[A]. A leaking tap
[B]. Simple pendulum
[C]. Shadow of an object during the day
Q14

[A]. m/s
[B]. km/s
[C]. km/h
[D]. km/min
Q15

[A]. Pie chart
[B]. Bar graph
[C]. Line graph
[D]. Histogram

Q16

[A]. km/h
[B]. s/m
[C]. m/s
[D]. mm/s
Q17

#### The slope of a distance-time graph of a moving object indicates:

[A]. Distance moved by the object
[B]. Time taken by the object
[C]. Speed of the object
[D]. Positions of the object
Q18

#### The regular vibration of which of the following electrically driven crystals are used for measuring time very accurately.

[A]. Calcite crystals
[C]. Chrome crystals
[D]. Quartz crystals
Q19

[A]. 1000 m
[B]. 2000 m
[C]. 1500 m
[D]. 1800 m
Q20

#### A student draws a distance time graph for a moving scooter and finds that a section of the graph is a horizontal line parallel to the time axis. Which of the following conclusion is correct about the section of the graph?

[A]. The scooter has uniform speed in this section
[B]. The distance travelled by scooter is the maximum in the section
[C]. The distance travelled by the scooter is the minimum in the section
[D]. The distance travelled by the scooter is zero in the section

Q21

[A]. Time graph
[B]. Bar graph
[C]. Pie chart
[D]. Line graph
Q22

#### The clocks and watches which are used for measuring time are based on:

[A]. Rectilinear motion
[B]. Circular motion
[C]. Periodic motion
[D]. Rotational motion
Q23

#### When the amplitude of vibration of a simple pendulum is increased, then its time period:

[A]. Decreases
[B]. Increases
[C]. Remains the same
[D]. First increases and then decreases
Q24

#### The distance time graph of a car which comes to a stop after convering a certain distance will be:

[A]. A straight line sloping upwards [B] [C] [D]
[B]. A curved line sloping downwards
[C]. A straight line parallel to time axis
[D]. A straight line parallel to distance axis
Q25

#### A man riding a scooter travels a distance of 70 meters in 20 seconds. What is the speed of the scooter?

[A]. 2.5 m/s
[B]. 3.5 m/s
[C]. 4.5 m/s
[D]. 50 m/s

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