Answer:
The outermost layer of a terrestrial planet is referred to as its "crust." All known life in the universe is contained in the thin, 40 kilometer (25 mile) deep crust of our planet, which makes up just 1% of Earth's mass. The crust, mantle, and core are the three layers that make up the earth. Minerals and solid rocks make up the crust. The mantle, which lies below the crust, is composed primarily of solid rocks and minerals with some pliable regions of semi-solid magma. There is a heated, dense metal core in the center of the Earth.