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Biology 3 Online
OpenStudy (anonymous):

[WILL GIVE MEDALS TOO] [WILL FAN ANYONE THAT HELPS] [8th Grade Physical Science]What is the defining feature of a system? A. properties that don’t change B. collision C. interaction D. gravitational force

OpenStudy (anonymous):

I think its C

OpenStudy (anonymous):

@aaronq

OpenStudy (aaronq):

yes that is right

OpenStudy (anonymous):

:D

OpenStudy (aaronq):

haha

OpenStudy (anonymous):

Oh and another thing is the nucleus of an atom always in the center

OpenStudy (aaronq):

yes it is, it's actually very small though. If you were to make a comparison, it would be like smaller than a grape while the radius of the atom is a football field|dw:1408477047249:dw|

OpenStudy (anonymous):

Thanks just wanted to know

OpenStudy (aaronq):

no probs

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