B . Deforestation could lead to reduced air
<span>The vertical sequence of the layers of soil is called a soil C. PROFILE.</span>
Answer:1. Yes, there are magma of different composition in existence. silicate mineral become molten at the same temperature of 1200 degree centigrade in igneous rock formation and this does not stop the composition of magma which are of three types basalic, andesitic and rhyolitic each of them have different composition ranging between iron, magnesium and calcium.
2. Partial melting is the reason why we have different forms of rock, this is because the mantle is composed of different minerals, these minerals doesn't melt uniformly, a mineral with low melting point will turn to liquid while the one with high melting point will turn to solid crystals. As the magma melts and flow slowly before it cools into solid rock it undergoes some physical and chemical changes which causes differences in the rock formed.
3. The last question depends on ever individual's location, where i am i can easily go and see granite at a mining site that deals with construction rocks which is an example of igneous rock.
GAO report said hundreds of planes flying commercially today could be vulnerable to having their on board computers hacked.
Answer:
•The existence of water at the Earth’s surface—neither too much nor too little—that is in liquid form.
•Proximity to the sun—neither too much heat nor too little.
•System of plate tectonics that enables the carbon-silicate cycle regulating temperature.
•The right size—large enough to hang on to its atmosphere, but not so large to hold on to too much atmosphere and consequently too much heat.
•Its protection by “big brother Jupiter,” whose gravity helps divert and vacuum up incoming debris and keep Earth safe.
•The moon’s stabilizing effect on our planetary rotation, which prevents the poles from shifting unexpectedly.
I hope this helps you.
