Many metals are extracted from ores that contain ________ minerals.
A. carbonate
B. sulfate
C. halide
D. silicate
Answer: B. sulfate
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Briefly describe how igneous rocks are classified
What will be an ideal response?
Sketch a cross-sectional view of Earth's interior, and label each of the layers you depict
What will be an ideal response?
Which of the following functions are performed by secondary messengers?
A) amplification of a message B) transmission of a message one cell to another C) both a and b D) neither a nor b
Judge the following sentence according to the criteria given below: A 1-unit change in pH represents a 100-fold change in hydrogen ion concentration BECAUSE pH is not a linear scale
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.