Answer:
<h2>Petroleum that is worthwhile extracting is usually found trapped in layers of permeable rocks by other layers of impermeable rock, but more recently reserves of gas and oil are being extracted from shale which is an impermeable rock but is porous in the sense that there are spaces (pores) within its structure in which ...</h2>
<span>The observation of rocks in several mountainous belts that today are separated by oceans provides evidence of continental drift. Continental drift is the displacement of continental masses relative to each other. The Appalachian mountain belt in eastern North America ends off the coast of Newfoundland. Mountains of the same age with rocks and similar structures are found in the British Isles and Scandinavia, when these land masses come together, the mountain ranges form an almost continuous belt.</span>
Samarkand is smaller in size than Tashkent.
Ice wedging and abrasion
putting trash in the water and piping sewage water in oceans
Temperature,the natureof the solvent,effect of ion type
