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Measurements are important in science. We use standard units to measure objects. Standard means that everyone uses the same units of measurement. There are many different instruments for measuring objects.

Standard units of measurement
  1. Length - metre (m)
  2. Weight - gram( g)
  3. Volume - litre (l)
  4. Temperature - degree (o)
  5. Time - second (s)
Measuring Length
To measure length we use millimetres (mm), centimetres (cm), metres (m) and kilometres (km). We measure lengths with a ruler, metre rod or measuring tape.
  1. 10 millimetres = 1 centimetre
  2. 100 centimetres = 1 metre
  3. 1000 metres = 1 kilometre
Measuring Time
In the early days people looked at the position of the sun in the sky and the length of shadows to tell time. Now we use clocks and watches. Time is measured in seconds (s), minutes (m) and hours (h).
  1. 60 seconds = 1 minute
  2. 60 minutes = 1 hour
  3. 24 hours = 1 day
Measuring Weight
Weight is measured in grams (g) and kilograms (kg). We measure weights with a weighing machine.
  1. 1000 grams = 1 kilogram
  2. 1000 kilograms = 1 tonne
Measuring Volume
We measure the volume of liquids such as water, petrol, milk and oil in millilitres (ml) and litres (l). Liquids are measured using jars or beakers. We can also measure the volume of solids. The volume of solids is measured in cubic meters (m3).
  1. 1000 millilitres = 1 litre
Measuring Temperature
We measure how hot or how cold something is. We do this by measuring temperature with a thermometer. There are different kinds of thermometers. A clinical thermometer is used to measure the temperature of the human body. Temperature is measured in degrees Celsius (oC) or degrees Fahrenheit (oF).
  1. 0oC = 32oF