Notes for Class 6th Science – Motion and Measurement of Distance

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Class 6th Science Motion and Measurement of
Distance
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Class 6th Science Motion and Measurement of
Distance

• In these notes, we will learn Motion, Types of
  Motion, Measurement of Distance, a standard unit
  of measurement, and SI Unit of length from
  Chapter 10 Class 6 Science.
• Stationary object
• Stationary objects are those objects that remain
  fixed and do not move from one place to another.
• Motion
• On contrary to the objects that remain stationary
  for example train, bus, animals, humans etc.,
  they can move. When there is a change in the
  position of any object with respect to time, then
  an object is said to be in motion. For Example,
  if the position of bus changes with time, it is
  said that the bus is in motion. Like the bus
  starts at 6 am and arrives at the Mumbai station
  at 11 am, the bus is in motion at that specific
  time.

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Class 6th Science Motion and Measurement of
Distance

• Types of motion
• 1 Rectilinear motion-
• It is related to when an objects motion is in a
  straight line in a fixed direction. For example,
  a bus moving in a straight line.
• 2 Circular motions
• When motion takes place along the curved path, it
  is called Circular Motion. For example, the blade
  of ceiling fans that rotate around the fan hub.
• 3 Periodic motion
• The motion which repeats itself after a fixed
  interval of time is called Circular Motion. For
  example, the ball bouncing in the air or earth in
  the orbit around the sun.

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Class 6th Science Motion and Measurement of
Distance

• 4 rotational motions
• When an object turns about a fixed axis is called
  Rotational Motion. For example, the wheels of the
  car move in a rotational motion or earth rotating
  on are the axis.
• To make your understanding more clear, enroll
  yourself with us by taking interactive online
  animated course of CBSE Class 6th
• Distance
• Distance refers to the length of space between
  two points. For example, the distance between
  Lucknow and Kanpur is 88 kms of length,
• In ancient times, people used various ways to
  measure distance like
• the length of the foot
• the width of the finger
• the distance of the step
•  But these ways cannot be used as the standard
  units of measurement as they are not accurate and
  varied. Thus, a uniform system of measurement is
  used the International System of Unit (SI Unit)
  which is accepted all over the world.

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Class 6th Science Motion and Measurement of
Distance

• To watch a free demo of Class 6th or other
  subjects, click  Online Video Classes
• Measurement
• When there is a comparison of an unknown quantity
  with some known quantity, it is called a
  measurement.
• The result of measurement has two parts, one part
  is the number and the other part is unit. The
  known quantity which is used in the measurement
  is unit.
• Need for the standard unit of measurement
• A unit of measurement which has a fixed value
  which is not arbitrary or does not change from
  person to person or place to place is called the
  standard unit of measurement length. We can use a
  variety of objects as units of measurement of
  length.
• SI Unit of length-
• Meter is a SI Unit of measuring length, The
  symbol of the meter is m.
• The SI Unit of measuring mass is kilogram. Its
  symbol is kg.
• The SI unit of measuring time is second. It is
  indicated as s.
• For more information on CBSE class 6th animation
  video click here
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  videos
• Check out another article for Class 6  The Earth
  In The Solar System
•