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==Key Stage 3==
===Meaning===
A [[Joule]] is a [[unit]] for [[measuring]] [[energy]]
===About Joules===
: [[Joule]]s are the [[SI Unit|scientific unit]] for [[measuring]] [[energy]].
===Unit Comparisons===
{| class="wikitable"
| style="height:20px; width:50px; text-align:center;" |'''Unit'''
| style="height:20px; width:50px; text-align:center;" |'''In Joules'''
|-
| style="height:20px; width:50px; text-align:center;" |1 Cal
| style="height:20px; width:50px; text-align:center;" |4.2J
|-
| style="height:20px; width:50px; text-align:center;" |1 KCal
| style="height:20px; width:50px; text-align:center;" |4200J
|-
| style="height:20px; width:50px; text-align:center;" |1 mJ
| style="height:20px; width:50px; text-align:center;" |0.001J
|-
| style="height:20px; width:200px; text-align:center;" |1 KJ
| style="height:20px; width:200px; text-align:center;" |1000J
|}
==Key Stage 4==
===Meaning===
The [[SI unit]] for [[Measure|measuring]] [[energy]].