Class 6 Science Chapter 10 MCQ Online Tests for 2020-2021
Class: 6 | Science |
Chapter: 10 | Motion and Measurement of Distances |
Contents: | MCQ Online Tests with Answer |
Class 6 Science Chapter 10 MCQ Test with Answers
Q1
Which of the following is a smallest unit of length?
[A]. km
[B]. mm
[C]. cm
[D]. m
Answer: Option B
Explanation:The SI unit of measuring length is meter.
10,00,000 millimeter makes 1 kilometer.
1,00,000 centimeter makes 1 kilometer.
1,000 meter makes 1 kilometer.
Thus, millimeter is the smallest unit of length and kilometer is the largest unit of length. But the SI unit of measuring length is “meter”.
Note: When we measure the distance between celestial bodies (stars, galaxy, asteroids etc.) we use light year.
Q2
One of the following types of motion will not be exhibited by the moon moving around the earth. This one is:
[A]. Rotational motion
[B]. Rectilinear motion
[C]. Circular motion
[D]. Periodic motion
Answer: Option B
Explanation:Motion in a straight line is called rectilinear motion. In other words, when an object moves along a straight-line path it is called rectilinear motion.
The motion will not be exhibited by the moon moving around the earth is rectilinear motion. And rest of three motions are exhibit by the moon.
Q3
A bicycle is moving on a straight road. Which of the following types of motion are exhibited by it?
[A]. Periodic motion and Rotational motion
[B]. Rotational motion and Rectilinear motion
[C]. Rectilinear motion and Circular motion
[D]. Periodic motion and Circular motion
Answer: Option B
Explanation:When an object turns or spins about a fixed axis, it is called rotational motion. When an object moves along a straight-line path it is called rectilinear motion.
When a bicycle moves on a straight road, turning of bicycle wheel shows the rotational motion. And as it goes in a straight road, it exhibits the rectilinear motion.
Q4
A piece of ribbon folded 5 times is placed along 30 cm long measuring scale as 2 cm to 27.5 cm. The length of the ribbon is between
[A]. 1.15 m – 1.25 m
[B]. 1.25 m – 1.35 m
[C]. 1.50 m – 1.60 m
[D]. 1.60 m – 1.70 m
Answer: Option B
Explanation:Since, ribbon is folded 5 times,
Length of ribbon = (27.5 – 2) cm x 5
= (25.5 x 5) cm
= 127.5 cm = 1.27 m
1.27 m lies in the range of 1.25 m – 1.35 m.
Q5
How many seconds are there in 1 day?
[A]. 1,24,400 Seconds
[B]. 92,400 Seconds
[C]. 86,400 Seconds
[D]. 64,400 Seconds
Answer: Option C
Explanation:We know that,
1 hour = 60 x 60 = 3600 seconds (Thus, 1 minutes = 60 seconds and 60 minutes make an hour)
24 hour = 3600 x 24 = 86,400 seconds
Q6
Which of the following modes of transport is not based on the invention of wheel?
[A]. Bullock cart
[B]. Boat
[C]. Bicycle
[D]. Bus
Answer: Option B
Explanation:In ancient times, people used boats for transport along water routes such as rivers or any water sources. Initially the boats were simple logs of wood in which a hollow cavity was made for people to sit and carry goods.
Q7
Which of the following types of motion is not exhibited by the earth moving around the sun?
[A]. Circular motion
[B]. Rotational motion
[C]. Rectilinear motion
[D]. Periodic motion
Answer: Option C
Explanation:The earth moves around the sun, so it has circular motion. The earth repeats its motion around the sun after regular intervals of time (means one year), so it has periodic motion and the earth rotates on its axis, so it has also rotational motion. Thus, the earth has three types of motion at the same time, circular motion, periodic motion and rotational motion.
Q8
Read the following sentences carefully, and choose the incorrect one:
[A]. Transport means to carry people and goods from one place to another.
[B]. People learnt to join together plank on wood to make boats having a streamlined shape.
[C]. The invention of wheel made a great change in the modes of transport.
[D]. In the beginning of 18th century, the invention of steam engine introduced a new source of power to run transport vehicles.
Answer: Option D
Explanation:In the beginning of 19th century, the invention of steam engine introduced a new source of power to run transport vehicles. Steam engines were used to pull trains on railroads or railway tracks for carrying people and goods from one place to another. Steam engines were also used to run ships in the beginning. The steam engine is called external combustion engine because the fuel or coal for making steam was burnt outside the engine.
Q9
Devesh appeared in class test but he confused to know the incorrect statement. Would you help him to know that?
[A]. The invention of internal combustion engine in the second half of 19th century gave us transport vehicles called automobiles.
[B]. Aero-planes where developed as a means of transport in the early 20th century.
[C]. The length of the space between two points or two places is called distance.
[D]. Compass (navigation) is invented by Egyptian.
Answer: Option D
Explanation:The compass was invented in China during the Han Dynasty between the 2nd century BC and 1st century AD where it was called the “south-governor”. The Chinese first used compasses not for navigation, but for spiritual purposes. They used the magnetic devices to organize buildings and other things according to feng shui, the ancient practice of harmonizing an environment according to the “laws of Heaven.”
Q10
Which of the following statement is or are correct?
[A]. Measurement is a process of comparing an object with standard unit of measurement.
[B]. Hand-span, fore-arm length and footstep cannot be used as standard units of measurement.
[C]. Unit of measurement which has a fixed value which does not change from person to person or place to place.
[D]. All the above.
Answer: Option D
Explanation:Here, are all the statements are correct. Hence, your answer will be option [D].
What do you mean by “one oscillation”, “vibratory motion” and “random motion”?
One complete cycle from the point of release to the other extreme and back to the initial point is called one oscillation. A very fast back and forth motion is called vibratory motion. When a body moves in different direction and does not have a fixed path, it is called random motion.
How many types of motion is exhibited by the earth moving around the sun?
The earth moves around the sun, so it has circular motion. The earth repeats its motion around the sun after regular intervals of time after one year. So, it has periodic motion and the earth rotates on its axis, so it has also rotational motion. Thus, the earth has three types of motion at the same time, circular motion, periodic motion and rotational motion.
Can you write, one differences between “circular motion” and “rotational motion”.
The difference between circular motion and rotational motion is that in circular motion an object as a whole travel along a circular path but in rotational motion, the object spins on its axis.
How many types of motion exhibited by the sewing machine?
The sewing machine has a wheel which rotates on its axle. So, the wheel of a sewing machine shows rotational motion. The sewing machine has also a needle which moves up and down continuously. The needle of sewing machine undergoes a periodic motion. Thus, a sewing machine exhibits two types of motion at the same time, rotational motion as well as periodic motion.
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