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Most scientific questions are based on A) opinions. B)hypotheses. C) observations. D) experimental data.
asked
May 1, 2018
Biology
high-school
2
answers
1
vote
78.1k
views
How did the development of agriculture lead to the presence of cities?
asked
Mar 6, 2018
History
middle-school
2
answers
5
votes
6.8k
views
Does boiling involve the same change of state as freezing?
asked
Jun 8, 2015
Chemistry
middle-school
1
answer
3
votes
18.2k
views
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