Melting of Earth's crust yields mostly silica-rich magmas because ____
A)the most abundant minerals in Earth's crust are silicates
B)silica is more easily melted than other minerals
C)many minerals produce silica when melted
D)silica has extremely low viscosity and move quickly up to Earth's crust from far underground
E)when silicon reacts with sodium chloride it form silica
A
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When experimenting with pucks on an air track you find that momentum is conserved for
A. elastic collisions. B. inelastic collisions. C. both of these D. none of the above
A scientific idea that is well established and unquestionable is a
A. fact of nature. B. valid hypothesis. C. both of these D. none of these
What is the term for ocean components not accounted for by the weathering of continents?
a. trace elements b. colligative properties c. conservative constituents d. nonconservative constituents e. excess volatiles
How many gallons of gasoline are consumed annually on average by a 25-year-old male driver if he drives a car with a fuel economy of 20 mpg?
What will be an ideal response?