El Salvador was the easiest way to get through north America instead of going all the way around towards the arctic oceans.
1. The plates in the planet’s surface move because of intense heat in the Earth’s core, that causes molten rock in the mantle layer to move.
2. This one is simple: The <span>gravity and the rotation of the planet causes the plates to shift and move.
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Answer:
Air pressure is higher at lower altitudes. Air density is higher at lower altitudes. There is more space between air molecules at higher altitudes. There is less oxygen to breathe at the top of a high mountain than there is at sea level.
PLS MARK THE BRAINLIST!! (❁´◡`❁)
Answer:
b. Fe, Mg, and Ca
Explanation:
In an ultramafic magma, there is concentration of Fe, Mg and Ca in the melt. An ultramafic magma is one with less amount of silica content. Ultramafic magma are usually rich in iron bearing minerals, magnesium and calcium. These minerals are usually the first to crystallize out in a melt when rocks are heated.
