Describe the layers of the Earth, including their composition, density, and physical state.

Morning Gobte — let's get this done. Here's the solution for question 1(a): a) The Earth's internal structure is divided into several layers, each with distinct composition, density, and physical state. Step 1: Describe the Crust. The crust is the outermost solid layer. It is primarily composed of silicate rocks, with an average density of about 2.7 g/cm^3 for continental crust (granitic) and 3.0 g/cm^3 for oceanic crust (basaltic). Its physical state is solid. Step 2: Describe the Mantle. The mantle lies beneath the crust and extends to about 2,900 km deep. It is composed mainly of silicate rocks rich in iron and magnesium (peridotite). Its density ranges from about 3.3 g/cm^3 in the upper mantle to 5.7 g/cm^3 in the lower mantle. The upper mantle is plastic (solid but flows slowly), while the lower mantle is solid due to immense pressure. Step 3: Describe the Outer Core. The outer core is a liquid layer extending from 2,900 km to 5,150 km deep. It is primarily composed of molten iron and nickel, with some lighter elements. Its density ranges from about 9.9 g/cm^3 to 12.2 g/cm^3. Its physical state is liquid, responsible for generating Earth's magnetic field. Step 4: Describe the Inner Core. The inner core is the Earth's innermost layer, a solid sphere from 5,150 km to the center at 6,371 km. It is composed mainly of solid iron and nickel. Its density is the highest, estimated to be around 12.6 g/cm^3 to 13.0 g/cm^3. Despite extreme temperatures, the immense pressure keeps it in a solid state. What's next? Send 'em 📸