A silica tetrahedron is composed of four atoms of the element ________ and one atom of ________.

A. silicon; aluminum
B. silicon; iron
C. oxygen; silicon
D. aluminum; silicon
E. silicon; oxygen


Answer: C

Environmental & Atmospheric Sciences

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The key function of wetlands is as ________.

A. a habitat for marine species, including commercially important species B. a shipping refuge C. a recreational ground for humans D. a resource for many industrial chemical processes E. a wasteland to be drained and used by humans

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Compare and contrast the Ptolemaic System with the Copernican System. Are there any similarities? What are the key differences? How did the prevailing ideas or perspectives of society affect each of these explanations?

What will be an ideal response?

Environmental & Atmospheric Sciences

Explain the reactions that occur in a nuclear power plant

What will be an ideal response?

Environmental & Atmospheric Sciences