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An investigation to test the claim: All leaves are green.
{| class="wikitable"
|-
|'''Oak Leaf'''
|'''Beech Leaf'''
|[[File:ChestnutLeaf.png|center|200px]]
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*The different leaves that were chosen were was the '''independent variable'''.
*The colour of the leaves was the '''dependent variable'''
*The experiment was done at the same time of year for every tree because at different times leaves can change colour or fall off. This was a '''control variable'''
|}
{| class="wikitable"
|'''Results Table'''
|'''Variables'''
|-
|[[File:Results4.png|center|300px]]
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*The type of food chosen was the '''independent variable'''.
*The colour of the iodine after being added to food was the '''dependent variable'''.
*There are many '''control variables''' that should be done. If the food colour was blue or black it might give the wrong result, so all the food should be the same pale colour.
Another '''control variable''' is the amount of iodine used.
Another '''control variable''' is the amount of food used.
|}