GEOLOGY

Detailed explanation-1: -Earth consists of three main layers: the crust, the mantle, and the core (Figure 3.4). The core accounts for almost half of Earth’s radius, but it amounts to only 16.1% of Earth’s volume. Most of Earth’s volume (82.5%) is its mantle, and only a small fraction (1.4%) is its crust.

Detailed explanation-2: -The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core.

Detailed explanation-3: -Crust: the outer layer of rock on which humans and animals live and plants grow. Mantle: a semi-solid magma layer consisting of iron, magnesium, and silicon. Core: centrally located solid mass of metal (inner core) and a liquid mass of iron and nickel (outer core).

Detailed explanation-4: -Earth’s Interior. The Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life in the known universe.

Detailed explanation-5: -The mantle is divided into several layers: the upper mantle, the transition zone, the lower mantle, and D” (D double-prime), the strange region where the mantle meets the outer core.