Obsidian, pumice, and scoria have fine grained or no visible crystals because they were formed.
a) (<u>Cooled fast</u>/Cooled slow)
b) (inside/outside)
c) (above the Earth's surface/below the Earth's surface)
d) (intrusive/Extrusive)
Your answer would be... B. The climate on Earth has changed over time.
The right option is; A. windblown sand cutting and polishing exposed rock surfaces
Abrasion is best described as windblown sand cutting and polishing exposed rock surfaces.
Abrasion is a process of erosion which occurs when materials such as soil or rock is removed and wears away at a surface over time. The concentration, hardness, speed and mass of the moving particles are the factors that determine the level of abrasion. Abrasion generally can be caused in four ways which are; by wind, by ice or glaciation, through the action of waves, and by rivers. Abrasion can be found on rocky mountains, on cliffs, at beaches, streams, and beneath glaciers.
I'd say that it is the "<span>surfactant"</span>
No they are the same species just different breed, think of it like humans. does being light skin make you a different species? no
