Question

9th class social first lesson key words​

Answer 1

Answer:

Explanation:

The lesson Our Earth starts by describing our universe, mentioning how many galaxies are there and about our solar system. Earth is the third planet in our solar system. it is continuously revolving around the sun in orbital path. Earth consists of life due to various reasons such as existence of water, air etc,

                            Earth consists of three parts Crust, Mantle and Core. Crust is the outermost layer mantle is the middle on and core is the innermost layer. core is always burning due to combustion and all the excess heat is released by Volcanoes and Oceanic Fissures.

                            Earth is covered three parts in water and one part in land. which is 71 % in water and 29 % in land. Water is distributed in the forms of Oceans, Seas, Rivers, Lakes, Canals, Ponds and Glaciers.

                            Land consists of Hills, mountains, Valleys, Plateaus, Plains, Forests, Deserts etc,. There are Seven continents and Five Oceans. Continents are Asia, Africa, Australia, Europe, North America, South America and Antarctica. Oceans are Indian Ocean, Pacific Ocean, Arctic Ocean, Atlantic Ocean and Antarctic Ocean.

                            In this way various features of Earth are described to us in the lesson Our Earth.