Wednesday
April 23, 2014

Homework Help: Science

Posted by Laruen on Sunday, November 6, 2011 at 7:51pm.

How do you set up a controlled experiment ?
What's the purpose of a control group?
How many variables should a controlled experiment have?
What are the difference between observation and inferences?

I REALLY NEED HELP!!!!
PLEASE HELP ME !!!!

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