Question

As magma cools, the first minerals to ______ are rich in iron, calcium, and magnesium.

Answer 1

The first minerals to crystallize are usually those rich in iron, calcium and magnesium.

Answer 2

crystallize

Step-by-step explanation:

Magma is a mixture of liquid rock particles, dissolved gases and crystals of different metals. They are rich in calcium, iron, magnesium, potassium and sodium. Molten magma causes volcanic eruption and as a result all these elements are expelled out of the earth's inner core. Temperature of the magmas are very high ranging from 650 degree to 1250 degree celcius. They come out in molten form and slowly crystallizes and solidifies as rocks which is very rich in minerals like iron, calcium, magnesium, sodium etc.

Thus, as magma cools, the first minerals to crystallize are rich in iron, calcium, and magnesium.