Page 126 - Science Class 06

The change is the posi on of an object with v We buy many things according to length
me, in respect to its surroundings, the such as cloth, wire, pipe, land, wood,

object is said to be in mo on. etc.

It means the change of posi on from a
reference point, which is sta c, depicts the
distance covered by the moving object.

MEASUREMENT

Measurement is the ac on of measuring
something. We can measure me, weight,
height, temperature, length, speed and
more. If we didn’t have measurement, it A tailor and a carpenter measure
would be very hard to know when to go to length using measuring tape.

school, how much you weigh or how cold or
warm it is outside.

Life is so much easier when we know how
to measure things and that is why
measurement is so important.

Now, let’s learn about the units we use to
measure things:

Need to Measure Distance (Length) Man engaged in measuring distance.

Distance or length is one of the most
v To measure speed, area and volume, we
important physical quan es.
need to know the length or distance.
Measurement of distance is so important
v Equipment of different shapes and sizes
that the development in science could not
are made with the help of the
have taken place if we did not have the idea
measurement of length. Without the
of the measurement of length.
measurement of length, we cannot
We need to measure length for the make various parts of a machine of a

following reasons: definite shape and size.
v We need to measure length or distance
ANCIENT METHODS OF MEASURING
to know how far an object has travelled.
LENGTH
v Measurement of length gives us an idea
The measurement system commonly used
about how far a place is situated.
in the United States today is nearly the
v We have es mated the distance same as the brought by the colonists. These
between the earth and the stars and measures had their origin in various
other planets with the help of the countries such as Egypt, Rome, France, etc.
measurement of length.

126 Science-6