Answer:The three layers of the earth are :-
Answer:Any natural mass of mineral matter that makes up the earth's crust is called a rock. Rocks can be of different colour, sizes and textures.
Answer:The three major types of rocks are:-
Answer:When this molten lava comes on the earth’s surface, it rapidly cools down and becomes solid. Rocks formed in such a way on the crust are called extrusive igneous rocks.
Example - Basalt.
When the molten magma cools down deep inside the earth's crust. Solid rocks so formed are called intrusive igneous rocks.
Answer:The process of transformation of the rock from one to another is known as the rock cycle.
Answer:The hard rocks are used for making roads, houses and buildings.
Answer:Metamorphic rocks are those which are formed when the igneous and sedimentary rocks change their form under great heat and pressure.
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks
(i). (a) igneous
(iii). (b) minerals
(iv). (a) sedimentary rocks
(v). (a) Crust
|(i) Core||(a) Earth’s surface|
|(ii) Minerals||(b) Used for roads and buildings|
|(iii) Rocks||(c) Made of silicon and alumina|
|(iv) Clay||(d) Has definite chemical composition|
|(v) Sial||(e) Innermost layer|
|(f) Changes into slate|
|(g) Process of transformation of the rock.|
|(i) Core||(e) Innermost layer|
|(ii) Minerals||(d) Has definite chemical composition|
|(iii) Rocks||(b) Used for roads and buildings|
|(iv) Clay||(f) Changes into slate|
|(v) Sial||(c) Made of silicon and alumina|
Answer:We cannot go to the centre of the Earth because :-
Answer:Rocks roll down, crack, and hit each other and are broken down into small fragments. These smaller particles are called sediments. These sediments are transported and deposited by wind, water, etc. These loose sediments are compressed and hardened to form layers of rocks. These types of rocks are called sedimentary rocks. For example, sandstone is made from grains of sand. These rocks may also contain fossils of plants, animals and other microorganisms that once lived on them.
Answer:Igneous and sedimentary rocks can be changed into metamorphic rocks under great heat and pressure.
Limestone is an igneous rock and it can be changed into marble under heat and pressure.
Answer:(I). Karhai - Iron
Answer:(ii) Copper is used in the manufacture of electrical wire, copper pipes for water, copper cookware.
Salt used in our foods is made up of sodium and chlorine.
Chalks used in schools is a limestone.
Chalkboards are made up of slate.
Ceramics cups is made up of clay mudstone.
Graphite in pencils.
Door knobs and handles of Iron.
Humayun's tomb : The structure is of dressed stone clad in red sandstone with white and black inlaid marble borders.
Qutub Minar: made up of red sandstone and white marble.
Hawa Mahal of Jaipur: Built from red and pink sandstone.
India Gate: is made up of Sandstones.