Answer: Potassium-argon dating
Explanation:
Answer:
4. Glassy
5.phaneritic
6. Porphyritic
7. Alphanitic
Explanation:
Glassy or vitreous textures occur during some volcanic eruptions when the lava is quenched so rapidly that crystallization cannot occur. The result is a natural amorphous glass with few or no crystals. Examples include obsidian
Examples of aphanitic igneous rock include basalt, andesite and rhyolite.
Aphanitic rocks in contrast to phaneritic rocks, typically form from lava which crystallize rapidly on or near Earth's surface.
Porphyritic textures develop when conditions during cooling of a magma change relatively quickly
Explanation:
Answer:
The global winds are Prevailing winds, Trade winds, Polar winds
Explanation:
The large global system is created by uneven heating of the earth's surface from above and below the surface. The pressure is measured from the sea level. The large scale motion of air along with oceanic circulation is derived from thermal energy induced by the geomorphic agent and the sun's potential energy. Movement of these pressure belts from north to south is in the form of cells that are fundamental to the rotation of the earth's heating and cooling. On the basis of altitudinal variations, various latitudinal winds/ cells are formed like the Hadley, Polar and Ferrel cell. The ITCZ divides these into northern and southern parts. The equator is the origin of hadley cell and tradewinds and in mid latitudes from 30 to 60 degrees comes the Westerlies. And from 60 to 90 degrees the polar cells in northand south. The ITCZ is the region of mixing.
Answer: True
Explanation: Egypt is bordered by the red sea and the mediterranean sea
