Acertain igneous rock contains about 25 percent dark silicate minerals. the remainder of the rock is mostly calcium rich plagioclase feldspar. what type of composition does this igneous rock have?

a. granitic

b. basaltic

c. andesitic

d. ultramafic

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing

What is the equation for calculating rf values