Acceleration due to gravity
Treating the system as a point-like particle allows us to assign a quantity to the object and monitor this quantity throughout any changes. The complexity of the system which includes geometry, appearance, and extensions can complicate the studying of the system.
Answer:
1. The mantle, oceanic crust and continental crust have different densities because they are made of different kinds of rock with different densities. As a result, the rock that forms from that melt is less dense than the original rock. If you then partially melt that rock, you get a rock that is even lighter.
2. Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains. A volcanic arc system is a series of volcanoes that form near a subduction zone where the crust of a sinking oceanic plate melts and drags water down with the subducting crust.
Explanation:
