The farming conditions are not that much desired in Africa as in other countries.
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Answer:
b. crystallization above ground and crystallization below ground
Explanation:
The magma undergoes transition when it moves from the mantle layer toward the lithosphere. The reason for this is that the pressure and temperature drastically change. With other words, the magma starts to cool off as it comes toward the surface of the Earth. As the magma cools off it starts to crystallize, resulting in the formation of igneous rocks. When the magma comes out on the surface, known as lava in those cases, it cools of very quickly because the temperature and pressure are much lower. Because the cooling off occurs very quickly, the magma crystallizes quickly, so the crystals are small, and it forms extrusive igneous rocks. When the magma cools off underground, but still relatively close to the surface, the temperature and pressure are slightly bigger than those on the surface. Because of this, the magma cools off slower, thus it crystallizes slower. This results in the formation of larger crystals, and intrusive igneous rocks.
Answer:
C
Explanation:
Because the hot magma flow in the convection currents and these currents move the tectonic plates and make up the Earths crust.
Answer:
<u>Temperatures extremes.</u>
Explanation:
- If the energy that came in the form of incoming solar radiation on the earth did not reach the ground or faded away before reaching the earth's surface the earth would have become a cold planet like pluto far and secluded.
- Sun plays a major and big role in the formation of the earth what it is today. Sun's rays besides giving light to the solar system also a contributor to the heat energy that reaches the greater depth of the oceans and warms the landmasses from above also it acts to balance the earth's entire circulatory tilt in a flow.
- If the planet was left without the sun then life would not have existed on the planet as the root driving factor would have been lost, in other terms such type of hypothesis would have not been possible due to gravitational pull and other factors like density.
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