Question

fill in the blank question the last two minerals to crystallize out of a cooling body of magma are potassium and .

Explanation:

In the context of magma crystallization (a geological process), the last two minerals to crystallize are typically potassium feldspar and quartz (or sometimes muscovite mica, but feldspar and quartz are common). This relates to Bowen's reaction series, where minerals crystallize in a specific order as magma cools, with these forming later.

Answer:

The last two minerals to crystallize out of a cooling body of magma are potassium feldspar and quartz (or "muscovite" can also be a valid answer for the second blank in some contexts, but feldspar and quartz are more standard for this question).