Question

question 9 2 pts which of the following lists of minerals is correctly ordered according to melting temperature, from lowest to highest? quartz, calcite, muscovite, plagioclase amphibole, pyroxene, biotite, k - feldspar quartz, muscovite, pyroxene, olivine plagioclase, k - feldspar, halite, pyroxene question 10 2 pts all silicate minerals contain which of the following? (sio4)^-4 (oh)^-1 (so4)^-2 s^-2

Explanation:

For Question 9, the general order of increasing melting - temperature for common minerals is quartz (low melting point), muscovite, pyroxene, olivine (high melting point). For Question 10, silicate minerals are defined by the presence of the $(SiO_4)^{4 -}$ tetrahedral unit.

Answer:

Question 9: quartz, muscovite, pyroxene, olivine
Question 10: $(SiO_4)^{4 -}$