Brain Wave Education

Dear Students ,  I  have already uploaded the note for the unit 08 and I  hope you have refereed it now.  As I  have promised you we have created a video for you. I hope you will learn form it and if you have any doughts add a comment . If you subscribe and follow our channel and video you will be able to join with me to  walk in the path of knowledge,  thank you  and best regards  Nisansala Teacher  Brain Wave Channel Nature of the earth Part 1

Unit 08 The nature of the earth Grade 07   By Nisansala samadini (B.Sc. spp, PGDE,Higher dip in Eng, Dip. In teaching)   Our solar system   What is solar system? The  Solar System  is the Sun and all the objects that orbit around it. There are 8 planets in our solar system. Earth is position on 3 rd place according to the distance from the sun. 8 planets around the earth accordingly   The structure of the earth Earth is made out of 3 main layers 1.      Core 2.      Mantle 3.      Crust In this lesson we have to learn bout these 3 layers   Core ·         It is the inner most layer of the earth. ·         Thickness of this layer is 3500 Km. ·         It is made out of molten iron and Nickel. ·         The temperature of this layer is about 4400 0  C- 5000 0  C  ·         Upper part of it is consisting of molten iron and Nickel.   Mantle ·         It is positioned above the core. ·         Thickness is 2900Km. ·