Answer:
more rounded the grains are the more they have been moved around
Explanation:
Generally – the more rounded the grains are the more they have been moved around (i.e. the longer the length of time or distance they have moved). Angular grains cannot have travelled far
geolsoc.org.uk
"<span>A. The polar regions have long winters and short, cool summers." would be the correct answer.
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Answer:
Again please specify your question, you still haven't indicated what you want to be solved.
by formula units I assume you mean atoms?
I'll edit my answer accordingly if you could specify down in the comments.