Class 6 Science – Chapter 10

Motion and Measurement of Distances | NCERT Complete Notes

                                    

STAGE 0: Foundation / Basics

What is this Chapter About?

This chapter explains motion (movement of objects) and how distances are measured. It introduces standard units of measurement and correct ways to measure length.

Why Should We Learn This Chapter?

• To understand when an object is in motion or at rest
• To measure distances correctly in daily life
• To learn standard units used everywhere

Basic Meanings

Motion: Change in position of an object with time.

Measurement: Finding the size or length of something.

STAGE 1: Complete Chapter Explanation

Motion

An object is said to be in motion if its position changes with time with respect to a reference point.

Examples of Motion

• Moving bus
• Flying bird
• Running child

Non-Motion (Rest)

An object is at rest if its position does not change with time.

Measurement of Distance

Measurement means comparing an unknown quantity with a known standard.

Standard Units of Length

• Millimetre (mm)
• Centimetre (cm)
• Metre (m) – SI unit of length
• Kilometre (km)

Tools Used for Measurement

• Ruler / Scale
• Measuring tape
• Metre scale

Correct Way to Measure Length

• Place the scale along the length to be measured
• Start measurement from zero mark
• Eyes should be vertically above the reading

Types of Motion

• Rectilinear motion: Straight-line motion
• Circular motion: Motion in a circular path
• Periodic motion: Motion repeated at equal intervals

STAGE 2: NCERT Textbook Questions & Answers

Q1. What is motion?
Answer: Motion is the change in position of an object with time.

Q2. Name the SI unit of length.
Answer: Metre.

Q3. Name two tools used for measuring length.
Answer: Ruler and measuring tape.

Q4. What is rectilinear motion?
Answer: Motion of an object along a straight line is called rectilinear motion.

STAGE 3: Previous Exam Questions & Answers

Previous Exam Question:
Explain the correct way of measuring length.

Answer:
The scale should be placed along the object, measurement should start from zero mark, and the eye should be placed vertically above the reading.

Exam Insight:
Questions on units of length and types of motion are commonly asked in exams.

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📘 Class 6 Science – Chapter Series

1. Food – Where Does It Come From?
2. Components of Food
3. Fibre to Fabric
4. Sorting Materials into Groups
5. Separation of Substances
6. Changes Around Us
7. Getting to Know Plants
8. Body Movements
9. The Living Organisms and Their Surroundings
10. Motion and Measurement of Distances