Consturcion Of Earth Jawaharnagar Ldh

Construction of the earth (Science) Class: 6

Project made by: Inguidence of : Sneha Khiwa Kiran Kirandeep Kaur Gupinder Kaur Anu

Mohanjeet Kaur (Science Mistress) Samiksha Sharma (Computer Faculty)

Jawaharlal Nehru Govt Girls Senior Secondary, Jawahar Nagar, Ludhiana

Construction of earth Earth is made up of a series of layers as heavier material gravitated toward the center and lighter material floated to the surface the dense solid inner core of iron is surrounded by a liquid iron outer core the lower mantle consists of molten rock which is surrounded by partially molten rock in the mantle and crust between some of the layers there are chemical or structural changes that form discontinuities lighter elements such as silicon aluminum calcium potassium sodium and oxygen compose the outer crust

Crust The crust consists of the continents other land areas and the basins or floors of the oceans the day land of earth ,s surface is called the continental crust it is about 15 to 75 km[9 to 47] thick

Mantle The mantle and core make up for the largest part of earth s mass the entire mantle extends form the base of the crust to a depth of about 2 , 900 km [about 1 , 800 mi ] the mantle consists of mostly solid iron –magnesium silicate rock mixed with many other minor components including radioactive elements however even this solid rock can flow a sticky liquid

Core The core is divided into two parts the outer core and the inner core the outer core is about 2,260 km [ about 1,404 mi ] thick the outer core is a liquid region composed mostly of iron , with smaller amounts of nickel and sulfur in liquid form the inner core is about 1,220 km [about 758 mi ] thick the inner core is solid and is composed of iron nickel and sulfur in solid form.