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==Key Stage 3==
===Meaning===
A scientific '''investigation''' is when we examine the natural world to learn more about it.
===About Investigations===
: [[Experiment|Experiments]] are a type of investigation where we change one variable to see how it affects another in order to test a [[hypothesis]].
: An '''investigation''' that is not an [[experiment]] is one where we make [[observation]]s of the world without changing anything.