Science Notes: Class 6 Chapter 10
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Science Notes: Class 6 Chapter 10

  • Measurement means the comparison of an unknown quantity with a fixed quantity called a unit.

Standard Units of Measurement

  • In 1790, the french created a standard unit of measurement called the metric system.
  • For the sake of uniformity, scientists all over the world have accepted a set of standard units of measurement.
  • The system of units now used is known as the International System of Units (SI units).
  • The SI unit of length is metre.
  • 1m = 100 cm
  • 1cm = 10 mm
  • 1 Km = 1000 m

Types of Motion

  • Motion is a change in the position of an object with time.
  • Motion along a straight line is called Rectilinear Motion.
  • In a Circular Motion, an object moves such that its distance from a fixed pint remains the same.
  • Periodic Motion is when an object repeats its motion after a fixed interval of time.

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