Question

Magma tends to rise toward Earth's surface principally because ________. Magma tends to rise toward Earth's surface principally because ________. of convection in the mantle silica increases the viscosity of the magma rocks become less dense when they melt water is an abundant constituent of magma

Answer 1

Answer:

Rocks become less dense when they melt.

Explanation:

Magma tends to rise toward Earth's surface principally because rocks become less dense when they melt. When the Earth's crust becomes very hot the rocks are molten or semi-molten. As they are less dense when they melt they tend to move upwards to the surface. The melting of the rocks is a slow process due to the minerals that form the rocks which have different compositions.