In this Class 6 Science chapter 5 Measurement of Length and Motion, you will explore how people measure length using different tools—both old and modern. You will also learn about how things move, and the different types of motion we see around us every day. Get ready to use scales, observe movement, and become a young scientist who understands the world better through measurement and motion!
Have you ever wondered how your parents know how much cloth to buy for your school uniform, or how a tailor knows your size? How do we know how far our school is from home, or how high a swing goes? All these questions are answered by measuring length and observing motion.
By the end of this chapter, you will be able to:
- Understand what length is and how to measure it correctly.
- Identify and use standard units like metre, centimetre, and kilometre.
- Learn the correct way to use a scale for accurate measurement.
- Know what motion means and how to tell if something is moving or still.
- Explore different types of motion: linear, circular, and oscillatory.
- Observe and classify motion in objects around you.
Class 6 Science chapter 5 Worksheet
Download our Measurement of Length and Motion worksheet today and unlock a door to success.
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Ganita Prakash Class 6 Solutions
Measurement of Length and Motion Notes
What is Measurement?
Definition: Measurement is the process of finding the size, length, or amount of something using standard units.
Standard Units: These are fixed units used all over the world so that everyone measures the same way.
Units of Length:
- Millimetre (mm) – Smallest commonly used unit (used to measure very small lengths like thickness of a coin).
- Centimetre (cm) – Used in scale or ruler.
- Metre (m) – Standard unit for measuring length.
- Kilometre (km) – Used for measuring long distances (e.g., between cities).
Instruments Used for Measurement
- Ruler or Scale – Measures small lengths in cm and mm.
- Measuring Tape – Flexible, used to measure curved or longer surfaces (like a waist or room).
- Metre Rod – Used in schools and shops.
- Odometer – Found in vehicles, measures distance traveled.
Steps for Correct Measurement
- Place the scale properly along the object.
- Ensure your eye is level with the point being measured (no slanting view).
- Start measuring from zero mark, not from the edge of the scale.
Motion
What is Motion?
Definition: Motion means a change in the position of an object over time.
Types of Motion:
- Straight-line Motion – Movement in a straight path (e.g., car on a straight road).
- Circular Motion – Movement in a circular path (e.g., hands of a clock, fan blades).
- Periodic Motion – Repeated motion after a fixed time (e.g., swing, pendulum).
- Random Motion – Movement without a fixed path (e.g., fly flying in a room).
Rest vs Motion
Rest: An object is at rest if it does not change its position with time.
Motion: An object is in motion if it changes its position with time.
Fun Facts
The first units of measurement were body parts like foot, hand span, and cubit (elbow to fingertip).
These were not reliable, so standard units were introduced.
Points to Remember
Always measure using standard units.
Different objects use different units depending on size and distance.
Understanding motion helps us describe how things move in our daily life.
Class 6 Science Chapter 5 MCQs
1. What is the distance between two points known as?
a. Speed b. Length c. Weight d. Height
2. Which body part did Deepa use to measure the length of the table?
a. Hand span b. Foot c. Arm d. Finger width
3. How many divisions is one meter typically divided into on a meter scale?
a. 10 b. 50 c. 100 d. 1000
4. What was the Traditional Indian unit used by Deepa’s mother to measure the length of her uniform?
a. Hand span b. Yojana c. Dhanusa d. Char angula
5. What type of scale is typically used by tailors?
a. Metal rod b. Wooden ruler c. Laser d. Flexible measuring tape
Class 6 Science Chapter 5 Fill in the Blanks
1.Traveling is the act of going from one place to another using different modes of _____.
2._____ Methods of measurement using body parts were inconsistent.
3.Standard units provide a _____ way of measuring for consistency.
4.The position of the eye should be directly _____ the measurement mark to avoid parallax error.
5.The _____ is still used today by traditional workers such as carpenters and tailors.
6.If the ends of a scale are broken, you can use any other full mark as the _____ point.
Science Class 6 Chapter 5 Question Answer
1.Define measurement.
Ans. Measurement is the process of comparing an unknown quantity with a known quantity.
2.What is the full form of SI unit.
Ans. SI unit stands for International System of Units.
3.What is the system of unit of measurement used all over the world now? What is that for length?
Ans. The system of units used all over the world now is the International System of Units (SI units). The SI unit for length is meter.
4.What is circular motion?
Ans. Circular motion is a type of motion where an object moves along a circular path, constantly changing its direction but maintaining a constant distance from a central point.
5.What is periodic motion?
Ans. Periodic motion is a type of motion that repeats itself after a fixed interval of time.
