Most galaxies are of this type
What will be an ideal response?
elliptical
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Qualitatively, what happens to the hydronium ion concentration if you increase the hydroxide ion concentration?
A. The concentration of H3O+ increases, but the ratio stays the same. B. The concentration of H3O+ stays the same, but the ratio changes. C. The concentration of H3O+ increases to neutralize the excess hydroxide. D. none of the above
Calcite (calcium carbonate) is the most common non-silicate mineral in the Earth's crust.
Answer the following statement true (T) or false (F)
Over the last two decades, the Antarctic ice sheet has lost mass. However, the Greenland ice sheet has actually gained mass due to increased winter precipitation
Indicate whether the statement is true or false
What is the average geothermal gradient in the crust?
A) 20°C/km B) 30°C/km C) 45°C/km D) 100°C/km