Class 7 Science Chapter 13 MCQ (Multiple Choice Questions) of Motion and Time updated for new academic session 2022-2023. 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 2022-2023

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

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

[A]. The symbols of all units are written in singular.

[B]. Shadow of an object is shortest at noon.

[C]. Roman used sand clocks to measure time.

[D]. A nanosecond is one-millionth of a second.

Q2

#### 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.

Q3

#### A bus travel 54 km in 90 minutes. The speed of the bus is:

[A]. 0.6 m/s

[B]. 10 m/s
[C]

[C]. 5.4 m/s

[D]. 3.6 m/s

Q4

#### In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?

[A]. The unit of speed depends upon the unit of distance and the unit of time used.

[B]. The speed of an object can be calculated by dividing the “distance travelled” by the object, by the “time taken” to travel this distance.

[C]. The “distance traveled” divided by “time taken” actually gives us “average speed” of the car during that time.

[D]. All 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

#### 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

Q7

#### 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.

Q8

#### Bikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. If the distance time graph of an object is a straight line then it is moving with a constant speed

[B]. If the distance time graph of an object is not a straight line or curved line than the speed of an object is not constant.

[C]. The distance time graph of an object is a horizontal line parallel to the time axis, then the speed of object is zero and the object is not moving.

[D]. All the above

Q9

#### In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. The variation of distance travelled by an object with time can be seen more easily from a distance time graph than table form.

[B]. A bar graph is a diagram which shows information as bars of different heights.

[C]. A pie chart is a kind of graph or diagram which shows the percentage composition of something in the form of slices of a circle.

[D]. None of the above

Q10

#### A sprinter or a fast runner attains a maximum speed of 10 meter per second. What we will be his speed in kilometer per hour?

[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

#### Falcon is a bird which flies with a maximum speed of 320 km per hour. Calculate its speed in meter per second:

[A]. 118.8 m/s

[B]. 98.8 m/s

[C]. 60 m/s

[D]. None of the above

Q13

#### The most appropriate unit for expressing the speed of a space rocket is

[A]. m/s

[B]. km/s

[C]. km/h

[D]. km/min

Q14

#### The instrument installed in a car for measuring the distance travelled by the car is called.

[A]. Barometer

[B]. Speedometer

[C]. Anemometer

[D]. Odometer

Q15

#### The composition of air can be best represented by drawing a

[A]. Pie chart

[B]. Bar graph

[C]. Line graph

[D]. Histogram

Q16

#### A car moves with a speed of 40 kilometer per hour for 15 minutes and then with a speed of 60 kilometer per hour for the next 15 minutes. The total distance covered by the car is:

[A]. 100 km

[B]. 50 km

[C]. 25 km

[D]. 200 km

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

[B]. Quadric crystals

[C]. Chrome crystals

[D]. Quartz crystals

Q19

#### Which among the following is the smallest unit of time?

[A]. Second

[B]. Millisecond

[C]. Nanosecond

[D]. Microsecond

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

#### The train “A” travelled a distance of 150 km in 3 hours whereas another train “B” travelled a distance of 180 km in 4 hours. Which train travelled faster?

[A]. Train A

[B]. Train B

[C]. Both have same speed

[D]. Not to be calculated

Q22

#### Which of the following is the most appropriate unit for expressing the speed of a snail?

[A]. km/s

[B]. m/s

[C]. cm/s

[D]. mm/s

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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