GENERAL GEOLOGY

Detailed explanation-1: -The Four Layers Because of this, the crust is made of the lightest materials (rock-basalts and granites) and the core consists of heavy metals (nickel and iron). The crust is the layer that you live on, and it is the most widely studied and understood. The mantle is much hotter and has the ability to flow.

Detailed explanation-2: -The surface of the planet, where we live, is called the crust-it’s actually a very thin layer, just 70 kilometres deep at its thickest point. The crust and the lithosphere below (the crust plus the upper mantle) is made of several ‘tectonic plates’.

Detailed explanation-3: -The troposphere is the lowest layer of our atmosphere. Starting at ground level, it extends upward to about 10 km (6.2 miles or about 33, 000 feet) above sea level. We humans live in the troposphere, and nearly all weather occurs in this lowest layer.

Detailed explanation-4: -Earth’s layers constantly interact with each other, and the crust and upper portion of the mantle are part of a single geologic unit called the lithosphere.