Numbers And Units Worksheet With Answer Key Page 6

W4-6

Chemists and SI Units

The SI unit of volume is the cubic metre. This may be a useful unit for people filling up hot-air

balloons or swimming pools; it is much less handy for chemists and biologists. We tend to use

the litre (symbol L) when measuring and calculating for no better reason than this means we are

working with simpler numbers.

For similar reasons, we use the gram (symbol g) for mass instead of the kilogram, the kilojoule

(symbol kJ) for energy instead of the joule and the kilopascal (kPa) or atmosphere (atm) for

pressure instead of the pascal.

Q7. How many litres are there in one cubic metre? (Hint: 1 m = 1000 cm and 1 L = 1000 cm

Demonstrator's

Initials

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