Alexandra Gonçalves

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Alexandra Gonçalves
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A nice note page on biomolecules/macromolecules/organic compounds.

What is acid rain essay Acid Rain. Technically, acid rain is rain that has a larger amount of acid in it than what is normal. This article gives an informational, in-depth look at acid rain--its causes and effects; and solutions to the acid rain problem.

Waldorf ~ 6th grade ~ Geology & Mineralogy ~ main lesson book

Lots of photos of our Waldorf sixth grade mineralogy main lesson book pages. The Ring of Fire, Abraham Werner, The Rock Cycle and the poem Fire and Ice