Extra Questions for Chapter 5 Measurement of Length and Motion Class 6 Science Curiosity
Class 6 Science Measurement of Length and Motion Extra Questions
Multiple Choice Questions (MCQ)
Question 1. What is the SI unit of length?
(a) Kilogram
(b) Metre
(c) Centimetre
(d) Millimetre
Answer
(b) Metre
Question 2. Which of the following is a drawback of using body parts for measurement?
(a) It is uniform
(b) It varies from person to person
(c) It is easy to understand
(d) It is historical
Answer
(b) It varies from person to person
Question 3. What unit would you use to measure the length of a pencil?
(a) Kilometre
(b) Metre
(c) Centimetre
(d) Milligram
Answer
(c) Centimetre
Question 4. Which motion occurs when an object moves in a straight line?
(a) Circular Motion
(b) Oscillatory Motion
(c) Linear Motion
(d) Periodic Motion
Answer
(c) Linear Motion
Question 5. What is the purpose of using a reference point?
(a) To measure temperature
(b) To describe the position of an object
(c) To calculate area
(d) To estimate weight
Answer
(b) To describe the position of an object
Fill in the Blanks
1. The distance from the tip of the thumb to the tip of the little finger is called a ______.
2. If the ends of a scale are broken, you can use any other full mark as the ____ point.
3. A _____ is a fixed point used to describe the position of an object.
4. One kilometre is equal to _____ metres.
5. The motion of a swing is an example of ____ motion.
Answer
1. handspan
2. starting
3. reference point
4. 1000
5. oscillatory
True or False
1. The metre is divided into 100 millimetres. (True/False)
2. An object is in motion if its position changes over time. (True/False)
3. Body parts are a reliable method for measurement. (True/False)
4. Circular motion is when an object moves in a straight path. (True/False)
5. The units of length should always be written with uppercase letters. (True/False)
Answer
1. False
2. True
3. False
4. False
5. False
Match the Following
| Column A | Column B |
| 1. Metre | a) Repetitive back-and-forth movement |
| 2. Handspan | b) Distance measured using body part |
| 3. Linear motion | c) The SI unit of length |
| 4. Oscillatory motion | d) Movement along a straight path |
| 5. Circular motion | e) Movement along a curved path |
Answer
| Column A | Column B |
| 1. Metre | c) The SI unit of length |
| 2. Handspan | b) Distance measured using body part |
| 3. Linear motion | d) Movement along a straight path |
| 4. Oscillatory motion | a) Repetitive back-and-forth movement |
| 5. Circular motion | e) Movement along a curved path |
One Word Answer
Question 1. What is the SI unit of length?
Answer
Metre (m)
Question 2. How many centimetres are in a metre?
Answer
100 centimetres
Question 3. Name the types of motion in which a body moves along a straight path.
Answer
Rectilinear or linear motion
Question 4. What body part was commonly used for measurement in the past?
Answer
Handspan
Question 5. What type of motion is exhibited by a swing?
Answer
Oscillatory
Question 6. What is the smallest unit of length in a centimetre?
Answer
Millimetre (mm)
Question 7. Name the measuring device which can be used for measuring the girth of a tree.
Answer
Measuring tape
Question 8. How can measuring with different handspans lead to errors?
Answer
Variability in handspan size.
Question 9. How many millimetres are there in a centimetre?
Answer
10 millimetres
Very Short Answer Questions
Question 1. What should you do if a scale's ends are broken?
Answer
Use a full mark as the starting point.
Question 2. What is linear motion?
Answer
Linear motion is when an object moves in a straight line.
Question 3. What is the purpose of the International System of Units?
Answer
To standardize measurements globally.
Question 4. How should the scale be positioned when measuring?
Answer
In contact with the object.
Question 5. Why should scales be placed correctly when measuring length?
Answer
Scales should be placed correctly in contact with the object along its length to ensure accurate measurements.
Question 6. What is the correct way to write units of length?
Answer
Lowercase letters with a space before the number.
Question 7. How do visually challenged students measure lengths?
Answer
Using special scales with raised markings.
Question 8. What is a reference point?
Answer
A reference point is a fixed point used to describe the position of an object.
Question 9. Give an example of a reference point in daily life.
Answer
The park is two blocks north of the school.
Question 10. What ensures accurate measurements of positions?
Answer
Using consistent reference points ensures accuracy in measurements.
Question 11. When is an object considered to be in motion?
Answer
An object is in motion if its position changes relative to a reference point.
Question 12. What type of motion occurs along a straight line?
Answer
Linear motion occurs when an object moves along a straight line.
Question 13. Name an example of circular motion.
Answer
The motion of a merry-go-round is circular motion.
Question 14. What is oscillatory motion?
Answer
Oscillatory motion involves movement back and forth about a fixed position.
Question 15. What defines periodic motion?
Answer
Periodic motion repeats its path after a fixed interval of time.
Question 16. List one traditional method of measurement.
Answer
Using body parts for measurement was a traditional method.
Question 17. What is the importance of standard units of measurement?
Answer
Standard units provide a uniform way of measuring for consistency.
Short Answer Questions
Question 1. What type of motion is described when an object moves in a straight line without changing its direction?
Answer
This type of motion is called linear motion. It occurs when an object moves from one point to another in a straight path, like a car driving down a road.
Question 2. How is the length of a curved line measured?
Answer
The length of a curved line can be measured using a flexible measuring tape or by using a thread to trace the curve and then measuring the thread with a scale.
Question 3. Explain the concept of a reference point in measuring distance.
Answer
A reference point is a fixed object or location used to describe the position of another object. It helps in determining distances and positions accurately by providing a consistent point of comparison.
Question 4. How can you measure the length of a Curved line accurately?
Answer
To measure the length of a curved line accurately, you can use a flexible measuring tape or a thread. Place the thread along the curve, then measure the length of the thread against a straight scale.
Question 5. State two precautions to be observed while measuring length with the help of a metre scale.
Answer
Two precautions are:
- The initial point of distance must coincide with the zero reading of metre scale.
- The eye should be kept in line with the point of measurement.
Question 6. Why is it important to use standard units of measurement?
Answer
Standard units ensure consistent and accurate measurements worldwide, avoiding confusion and enabling reliable comparisons and communication.
Question 7. What is the significance of the metre in the International System of Units?
Answer
The metre is an important International System of Units as it is the base unit of length. It provides a consistent standard for measuring length, which is essential for scientific and everyday measurements.
Question 8. Define rest and motion.
Answer
The Objects which do not change their positions with time are said to be at rest. The objects which change their positions with time are said to be in motion.
Question 9. What type of motion does a pendulum exhibit?
Answer
A pendulum exhibits oscillatory motion, moving back and forth around a fixed position.
Question 10. How can you measure the thickness of a single page in a book?
Answer
To measure the thickness of a single page, you can measure the thickness of a stack of pages, count the number of pages, and then divide the total thickness by the number of pages.
Question 11. How is oscillatory motion different from linear and circular motion?
Answer
Oscillatory motion is different from linear and circular motion in that it involves an object moving to and fro about a fixed position. Linear motion involves movement along a straight path, while circular motion involves movement along a circular path.
Question 12. What is a reference point in the context of motion?
Answer
A reference point is a fixed point used to determine the position or movement of an object.
Question 13. Describe the process of measuring an object using a scale with broken ends.
Answer
To measure an object using a scale with broken ends, you can start from a full mark on the scale instead of the zero mark. Measure the length from this point and subtract the initial reading to get the correct length.
Long Answer Questions
Question 1. Three students measured the length of a corridor and reported their measurements. The values of their measurements were different. What could be the reason for difference in their measurements? (Mention any three)
Answer
Some of the reasons for difference in their measurement could be:
- Different measuring devices were used.
- The smallest length that could be measured by different devices may be different.
- Measurement may not be along the shortest length in all three cases.
- The end of the corridor may not be easily accessible.
Question 2. What type of motion do the following objects have?
(a) The galloping of a horse
(b) The needle of a sewing machine
(c) The bike move on a straight road
(d) The blades of an electric fan
(e) Truck moving in a well.
(f) Wheels of moving car.
Answer
(a) The galloping of a horse: Linear motion
(b) The needle of a sewing machine: Periodic motion
(c) The bike move on a straight road : Linear motion
(d) Blade of an electric fan: Circular motion
(e) Truck moving in a well: Circular motion
(f) Wheels of moving car: Linear motion and Rotational motion
Question 3. Write the correct techniques for measuring length accurately. Explain why are they important?
Answer
Correct techniques for measuring length include placing the scale in contact with the object, aligning the scale properly along the object’s length, and positioning the eye directly above the measurement mark to avoid parallax errors. These techniques are important to ensure accuracy and consistency in measurements. For example, measuring a pencil with a broken scale requires starting from a full mark and subtracting the initial reading to obtain the correct length.
Question 4. Why is it important to use standard units of measurement in everyday life?
Answer
It is important to use standard units of measurement in everyday life to ensure consistency, accuracy, and reliability. Standard units allow for clear communication and comparison of measurements, which is important in fields such as science, engineering, and trade. Without standard units, measurements would vary widely depending on the person taking the measurements. It leads to confusion and errors.