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Posted by on Wednesday, June 18, 2008 at 12:57pm.

2. To make observations, an observer must always use
(1)experiments
(2)the senses
(3)proportion
(4)mathematical calculations
Is it (2)?

  • Earth Science - , Wednesday, June 18, 2008 at 1:30pm

    Right!

  • Earth Science - , Wednesday, June 18, 2008 at 1:36pm

    Thanks!

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