Which of these terms describes the soil and rock that must be removed before surface mining of an ore can commence?
A. overburden
B. underburden
C. overweight
D. spoils
Answer: A
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How does burning fossil fuels impact Earth's climate?
A. It warms the climate by increasing atmospheric water vapor. B. It does not affect Earth's climate. C. It cools the climate by exhausting oxygen into the air. D. It warms the climate by increasing greenhouse gas emission.
Photosynthesis takes place in which cellular organelle
A. Chloroplast B. Chlorophyll C. Nucleus D. Lysosome
This figure has rock units and geologic features that are assigned letters that are not in any particular order. From the geologic relations, what is the oldest unit?
A. conglomerate (unit C) B. granite (unit G) C. limestone in the far right (unit K) D. lava flow (unit L) E. dike (unit D)
Which pie graph correctly shows the percentage of elements by volume in Earth’s troposphere?
