Which of these would most likely happen if there is a sudden increase in the number of sunspots. Summers would become colder.
Earth‘s tilt on its axis would decrease.
earths climate would become warmer.
length of days and nights would increase.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.