This document discusses different units of measurement including length, volume, mass, temperature, and time. It provides details on common units like meters, liters, kilograms, degrees Celsius, and hours. Measurement tools are also outlined, such as meter rules for length, beakers for volume, scales for mass, thermometers for temperature, and clocks or stopwatches for time. Examples are given for conversions between units like centimeters to millimeters, and cubic meters to liters.

1. Length Temperature
Volume Time
Weight
Author : Mr Lam

2.  In laboratory, we use “meter-rule” or “half-
meter rule” to measure length
1km = 1000m
1 m = 100cm
1cm = 10mm

4.  How can you measure the diameter of pencil
leads?

6.  Ancient Egyptians measuring unit is cubit.
One cubit is the length from the fingertip to the
elbow.

7.  What are the advantages and disadvantages of
the Egyptians measurement system?
 If you are living in ancient Egypt, what would
you suggest to improve the measurement
system?

8.  Volume is a measure of the space an object
occupied.
 Volume is measured by cubic meters 𝑚3
 For smaller volume, we use cubic centermeters
𝑐𝑚3
 𝑉𝑜𝑙𝑢𝑚𝑒 = 𝑊𝑖𝑑𝑡ℎ × 𝐻𝑒𝑖𝑔ℎ𝑡 × 𝐿ength

9.  For liquid, we use “Litre” (L) or “millilitre”
(mL) as units to measure the volume
 1𝑚3 = 1000𝑚𝐿
 1𝐿 = 1000𝑚𝐿
 1𝑚𝐿 = 1𝑐𝑚3

13.  How can you measure the volume of
something that floats on water?
e.g. Styrofoam

14.  Is beaker a good instrument to measure
volume? How can you find it out?

15.  Mass is a measure of the amount of substances
 The bigger the mass, the more difficult to move the
object (inertia)
 The mass of an object always the same no matter
which part of the universe the object is.
 The unit of mass is kilogram (kg) or gram (g)
 Weight is a measure of how much gravitational
pull from the centre of the Earth.
 Weight of an object on the Earth is different it is on
the Moon.
 The unit of the weight is Newton (N)

16.  1𝑘𝑔 ≈ 9.8𝑁 𝑜𝑟 10𝑁 On the surface of the
Earth.
 In the daily life, one says his weight is 60kg.
Stickily speaking, this is scientifically incorrect.
He is better to say his weight is approximately
600N

17. Examples
of scales/
balances

19.  Temperature is a measure of how hot or cold of
an object
 The instrument used to measure temperature is
called “thermometer”
 The unit of temperature is degree Celius (°C),
or Kelvin (K)
 Human average core body temperature is
37°𝐶 ± 0.5°𝐶

22.  Time is measured in second (s), minute (min)
or Hour (hr)
 We use watch or clock to measure time
 In laboratory, the standard instrument to
measure time is stop watch.