EVERYDAY SCIENCE

Detailed explanation-1: -The inner core is a hot, dense ball of (mostly) iron. It has a radius of about 1, 220 kilometers (758 miles). Temperature in the inner core is about 5, 200° Celsius (9, 392° Fahrenheit). The pressure is nearly 3.6 million atmosphere (atm).

Detailed explanation-2: -The inner most layer of earth is the core. The Earth is divided into 3 main layers. Crust (outermost), mantle and core (innermost). Option (a) is the correct answer.

Detailed explanation-3: -It is composed of metals such as iron and nickel. The outer core surrounds the inner core. The inner core has pressures and temperatures so high that the metals are squeezed together and not able to move like a liquid but are forced to vibrate instead of solid.

Detailed explanation-4: -The core of the Earth is made up mainly of iron, in an outer liquid layer and an inner solid layer. The outer core is where the circulating conducting liquid generates the geodynamo, responsible for our magnetic field.

Detailed explanation-5: -The core is the innermost layer of the earth with density 5.1 to 13.00. It composed of heaviest minerals. This central mass is mainly made of nickel and iron and therefore is known as NIFE. The core contains 1/3 of the entire mass of the earth.