Which statement best explains why obsidian has a smooth glassy surface but basalt has a rough surface? a. obsidian is formed due to compaction and basalt is formed due to weathering. b. obsidian allows less crystal growth than basalt because it cools more rapidly than basalt. c. basalt is more easily eroded than obsidian because it is formed at a lower temperature than obsidian. d. basalt is formed from the erosion of sediments and obsidian is formed due to the metamorphosis of rocks.

a because it's the only one that made sense to me when i read it hoped this helped.

Option (B)

Explanation:

Obsidian and basalt are both extrusive igneous rocks, that are formed when magma comes out to the surface of the earth. Basalt forms along the mid-oceanic ridge in the divergent plate motion, on the ocean floor, whereas obsidian forms in the continental areas from the eruptions of volcanoes.

As they come out to the surface, the minerals do not get enough time to form small and well-shaped crystals, because of the low temperature near the earth's surface. Due to this reason, basalt is comprised of coarse-grained crystals.

Obsidian is a rock that is comprised of no crystals. It solidifies at a much faster rate in comparison to basalt.

Thus, obsidian has a smooth glassy surface as forms no crystals and cools much rapidly than basalt.

Hence, the correct answer is option (B).

i think so it’s will be b yes i believe its

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.