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Mathematics 21 Online
OpenStudy (anonymous):

1. Which of the following objects would require the use of a large-scale model? A.An atom B.A car engine C.A frog's heart D.The Mississippi River 2. Scott stated the following series of observations. Which represents a theory? A.I observed three stars in the sky. B.The stars give off light. C.Light travels at 300,000 kilometers per second. D.Stars are balls of hot gases.

OpenStudy (dragons1415):

1. ) A. an atom because an atom is so small, you wouldn't be able to use a microscope to see one. 2.) I think it's C, light travels at 300,000 km/s, because it's been scientifically proven..... but, im not completely positive...

OpenStudy (anonymous):

Thank you! If they are correct, I'll give you a medal!

OpenStudy (dragons1415):

No problem! and thanks!

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