felsic

As adjectives the difference between acid and felsic

is that acid is acid; sour; tart (having a sharp taste such as that of vinegar or a lemon) while felsic is (mineralogy) enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.

As nouns the difference between acid and felsic

is that acid is acid (a food with a sharp taste) while felsic is a rock with such properties.

As adjectives the difference between felsic and intermediate

is that felsic is enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium while intermediate is being between two extremes, or in the middle of a range.

As nouns the difference between felsic and intermediate

is that felsic is a rock with such properties while intermediate is anything in an intermediate position.

As a verb intermediate is

to mediate, to be an intermediate.

As adjectives the difference between ultramafic and felsic

is that ultramafic is describing igneous rocks that contain magnesium and iron and only a very small amount of silica, such as are found in the Earth’s mantle while felsic is enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.

As nouns the difference between ultramafic and felsic

is that ultramafic is a rock with such properties while felsic is a rock with such properties.