EVERYDAY SCIENCE

Detailed explanation-1: -Earth’s crust is generally divided into older, thicker continental crust and younger, denser oceanic crust . The dynamic geology of Earth’s crust is informed by plate tectonics.

Detailed explanation-2: -There are two kinds of crust: continental crust, and ocean crust. Continental crust is thicker, and predominantly felsic in composition, meaning that it contains minerals that are richer in silica. The composition is important because it makes continental crust less dense than ocean crust.

Detailed explanation-3: -The oceanic crust is mainly made out of dark basalt rocks that are rich in minerals and substances like silicon and magnesium. By contrast, the continental crust is made up of light-colored granite rocks full of substances like oxygen and silicon.

Detailed explanation-4: -The continental crust is made up of a variety of rocks from sedimentary rocks such as sandstone and limestone to metamorphic rocks such as marble and slate, and igneous rocks like granite.

Detailed explanation-5: -Continental plates have a lower density than Oceanic plates. Granite and recycled materials are much thinner than the ocean plates’ thick basalt layers. Oceanic plates occupy about 71% of the Earth’s surface. Continental plates make up 29% of the Earth’s surface.