secondary sources.. high school science!?

eromarap

New member
hey,
I know I am putting this in the 'polls' section but there are heaps of people in this section. You don't have to answer though. Just wanna know TWO reasons for using secondary sources when doing a science project. I've got like assessing the reliability and stuff but yeah I'm pretty tired hahaha.
Thanks heaps!!
:)
 
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