10) base your answer on the bedrock cross section below, which represents part of earth's crust where natural gas, oil, and water have moved upward through a layer of folded sandstone and filled the pore spaces at the top of the sandstone layer. the final arrangement of the natural gas, oil, and water within the sandstone was caused by differences in their
a) density
b) specific heat
c) relative age
d) radioactive half-life

The answer is letter A: density.

Explanation:

On the bedrock, these materials lay with different arrangements within the sandstone because they have different densities.  The natural gas is on top because of its low density, gases are a homogeneous fluid of low density and low viscosity. Followed by the oil, that has larger molecule components and heavier components, making them denser than gas. Next is the water, which has the most density of all (due to its molecules that can pack tightly together), so it comes in last.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

ne pare rău, dar când mi-am căutat întrebarea, doar avioanele au apărut .. deci, ar putea fi răspunsul, sau ar putea fi baloane cu aer cald, deoarece acestea pot conta și ca ambarcațiunile de aer, dar nu sunt complet sigur de asta. a fost doar o presupunere, sper că am ajutat, îmi pare rău dacă nu am făcut-o. de asemenea, folosesc traducerea google, pentru a traduce ceea ce spun în engleză, așa că îmi pare rău dacă gramatica sau chiar limba nu este corectă