A good place to start is any good dictionary --
www.onelook.com (there's a wide variety of dictionaries to choose from here)
Look under the definitions. You'll see the major parts of this word that came to us from the Greek. The root is -log- from the Greek word for words or study; the prefix is from the Greek word oikos (house) and -ist is the suffix that indicates "a person who..."
I would divide up "ecologists" like this:
Try again with "contributions."
Would log be the root in ecologists?
Yes, "log" is the root in "ecologists."
I almost agree with what you wrote for "contributions" -- see what you think:
I am confused because I think on the word contribute, tribute would be the root. I'm just confused about why this would change on contributions.
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