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FrozenT [24]
3 years ago
5

Joshua has decided that he wants to test the affects of acid rain on the growth of plants. What does Joshua need to do before an

y experimenting?
Social Studies
1 answer:
ira [324]3 years ago
7 0
Gather all materials, conduct a control trial and get data from that, recording as you go, and then you are able to start.
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