The concept would be crystallization. As magma cools inside or outside of the earth it crystallizes into an igneous rock. Intrusive (formed inside crust) igneous rocks are typically more course grained and contain many different noticeable minerals (for example, granite). Extrusive (formed outside) igneous rocks are typically more porous and are more fine grained then intrusive rocks (example, obsidian).
Answer:
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Explanation:
Plants take their nitrogen from the soil which would have been converted by bacteria ...not straight from the atmosphere
A biological community with organisms interacting within their environment :)
Answer:
the answer is 'rectilinear propogation of light'
Explanation: