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Motion and Measurement of Distances Class 6 Worksheet Science Chapter 7

Q1. Fill in the blanks:

i. Measurement is the comparison of an unknown quantity with some              quantity.

Ans. fixed

ii. 1 km =            m.

Ans. 1000

iii. Standard unit of length is              .

Ans. metre

iv. The length of curved line can be measured using a               .

Ans. thread

v.              is the distance between two points or ends of an object.

Ans. Length

vi.                   means the change in position of an object with time.

Ans. Motion


Q2. True/False:

i. The choice of device used for the measurement depends on the type of measurement to be made. 

Ans. True

ii. Our senses are reliable for accurate measurement. 

Ans. False

iii. 1m = 100cm. 

Ans. True

iv. 5km = 5000cm. 

Ans. False

v. Motion of a child on a swing is periodic motion. 

Ans. True

vi. Motion of a wheel of a cycle is random motion. 

Ans. False


Q3. Which measuring device can be used to measure the girth of a tree?

Ans. Measuring tape


Q4. Write the type of motion in which a body moves along a straight path.

Ans. Rectilinear or linear motion


Q5. Which unit of length is used to measure a large distance?

Ans. Kilometre


Q6. Write one example of circular motion.

Ans. Motion of hands of a clock


Q7. Write one example of rectilinear motion.

Ans. Motion of an apple falling from a tree


Q8. Write one example of periodic motion.

Ans. A bouncing ball


Q9. Name the type of motion in which a body moves along a curved path.

Ans. Circular or Rotational motion


Q10. Name the type of motion in which motion repeats after equal time interval.

Ans. Periodic motion


Q11. The distance between Ria’s house and temple is 1340 m. Express this distance in kilometre.

Ans. 1 km = 1000m

       1340/1000 = 1.340 km


Q12. Find the length of square in mm.

Motion and Measurement of Distances Class 6 Worksheet Science Chapter 7
Ans. Each side = 5 x 10 = 50mm (All sides of square are equal)


Q13. Define ‘unit’.

Ans. The fixed quantity with which we compare an unknown quantity is called unit.


Q14. When object is said to be in rest?

Ans. If the position of an object does not change with time, it is said to be at rest.


Q15. What do you understand by ‘measurement’?

Ans. Measurement means the comparison of some unknown quantity with a known fixed quantity of same kind.


Q16. What is the common in between hand span, pace, angul and fist?

Ans. All of these are non-standard units of measurement that changes from person to person.


Q17. When object is said to be in motion?

Ans. When an object changes its position with time with respect to another object, it is said to be in motion.


Q18. Why is the hand span not considered as a reliable unit for measuring the length?

Ans. Hand span is not considered as a reliable unit for measuring the length because length of hand span varies from person to person.


Q19. What do you understand by standard unit of measurement?

Ans.The unit which is acceptable to the majority of people as a basic unit of measurement is called standard unit of measurement.

Assertion and Reason Questions
Q20. Assertion (A): Motion of moon around the earth is a circular motion.
Reason (R): In a circular motion, the distance of object from a fixed point remains the same.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Ans. (a)

Q21. Assertion (A): In ancient times bullock cart was used as a means of transport.
Reason (R): Aeroplanes were developed only in 1800 AD.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Ans. (c)

Q22. Assertion (A): The motion of a ball rolling on the ground is nothing but a rectilinear motion.
Reason (R): The motion of ball rolling on the ground is a combination of different types of motion.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Ans.
(d)

Q23. Assertion (A): If an object travels in such a way that it comes back to the starting position, then the displacement is zero but, the distance travelled is not zero.
Reason (R): The displacement is the shortest distance between the initial and final position of the body whereas, distance is the actual path length covered by an object.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Ans. (a)

Q24. Assertion (A): While measuring the length, the eye of the observer should be exactly above that point of measurement to avoid the parallax error.
Reason (R): The scale used to measure the length of the object must be greater than the length of the object.

(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Ans. (c)

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FAQs on Motion and Measurement of Distances Class 6 Worksheet Science Chapter 7

1. What is motion and why is it important to study?
Ans. Motion refers to the change in position of an object with respect to its surroundings. It is important to study motion as it helps us understand how objects move and interact with each other. This knowledge is essential in various fields such as physics, engineering, and even everyday activities like driving or playing sports.
2. How can we measure the distance traveled by an object?
Ans. The distance traveled by an object can be measured using various methods. One common method is using a measuring tape or ruler to directly measure the length between the starting and ending points. Another method is using a measuring wheel or an odometer to measure distances in a more practical and convenient manner.
3. What is the difference between distance and displacement?
Ans. Distance refers to the total length traveled by an object, regardless of its direction. On the other hand, displacement refers to the straight-line distance between the initial and final positions of an object, taking into account both magnitude and direction. Displacement can be zero if the object returns to its initial position, while distance will always be a positive value.
4. How can we calculate the average speed of an object?
Ans. The average speed of an object can be calculated by dividing the total distance traveled by the object by the time taken. Mathematically, average speed = total distance ÷ time. For example, if a car travels 200 kilometers in 4 hours, the average speed would be 50 kilometers per hour.
5. What are some examples of objects in motion?
Ans. There are numerous examples of objects in motion. Some common examples include a moving car, a flying airplane, a swinging pendulum, a rolling ball, a running athlete, and even the Earth rotating on its axis. Motion can be observed on various scales, from the movement of celestial bodies to the motion of subatomic particles.
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