Look at a meter scale carefully and answer the following:

**Numerical Problems**

* Look at a meter scale carefully and answer the
following:

* How many mm are there in a cm?

**Solution:** 10
mm = 1 cm

* How many cm are there in a m?

**Solution:** 100
mm = l m

* Complete the following:

• 7875 cm = ** 78** m

• 1195 m = ** 1** km

• 15 cm 10 mm = ** 160** mm

• 45 km 33 m = ** 45033** m.

**A Quick Look**

* The comparison of an unknown quantity with some known quantity is known
as measurement.

* All physical
quantities have standard units for the sake of uniformity.

* Length, mass and
time are some of the fundamental physical quantities.

* The SI units for

Length - metre

Mass - kilogram

Time - second

Volume - litre (or) cm^{3}

* While using ruler, the accurate measurement can
be arrived by avoiding three types of possible errors.

* Volume of solids, liquids and regular objects is
measured by direct measurement.

* Volume of irregular objects can be measured by
water displacement method.

* Electronic balance is an instrument to provide
accurate measurement of mass correct up to milligram.

Tags : Measurements | Term 1 Unit 1 | 6th Science , 6th Science : Term 1 Unit 1 : Measurements

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6th Science : Term 1 Unit 1 : Measurements : Numerical Problems | Measurements | Term 1 Unit 1 | 6th Science

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