GENERAL GEOLOGY

Detailed explanation-1: -The Earth gets hotter as one travels towards the core, known as the geothermal gradient. The geothermal gradient is the amount that the Earth’s temperature increases with depth. It indicates heat owing from the Earth’s warm interior to its surface.

Detailed explanation-2: -Temperature and pressure progressively increase with increased proximity to Earth’s core. Recent studies indicate the core’s temperature may be close to 11, 000 degrees Fahrenheit; that’s nearly 2, 000 degrees warmer than previously thought and hotter than the surface of the Sun, according to a 2013 Forbes article.

Detailed explanation-3: -Temperature increases due to the gas and pressure present inside the surface of the earth. The temperature increases because we go near to the core of the earth which is metallic and hotter.

Detailed explanation-4: -As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plate boundaries, temperature rises in about 25–30 °C/km (72–87 °F/mi) of depth near the surface in most of the world.

Detailed explanation-5: -The geothermal gradient is about 25° Celsius per kilometer of depth (1° Fahrenheit per 70 feet). The primary contributors to heat in the core are the decay of radioactive elements, leftover heat from planetary formation, and heat released as the liquid outer core solidifies near its boundary with the inner core.