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Because of how long it takes to form underground and then it moves to the surface and cools rapidly
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Answer:
The answer would be Point of Reference.
In order to determine, whether an object has moved or not, a point of reference is required. The reference point is required to the measure the movement of the object, without a reference point the distance or displacement cannot be obtained. Hence, a reference point is very required to determine, whether the object has moved or not.
(Hope this helps) Sky
Visible light spectrum.
The visible light spectrum is part of the electromagnetic radiation spectrum
Answer:
H2SO4 + Al(OH)3 = Al2(SO4)3 + H2O
Explanation: