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→Key Stage 4
==Key Stage 4==
===Meaning===
'''Kilojoules''' ('''kJ''') are a [[unit]] of [[energy]] 1,000 times larger than the [[SI Unit]] of the [[Joule]]s.
===About Kilojoules===
: '''Kilojoules''' are shortened to '''kJ''' with a lower case k and an upper case J.