i. Igneous rocks are also called primary rocks.
ii. Gold, petroleum and coal are examples of minerals.
iii. The thinnest layer of the earth is crust.
iv. Deccan plateau is made up of basalt rocks.
v. The Taj Mahal is made of white marble.
i. There are two types of igneous rocks: intrusive rocks and extrusive rocks. True
ii. Rocks which contain fossils are metamorphic rocks. False
iii. Clay changes into slate and limestone into marble. True
iv. It is constantly undergoing changes inside and outside. True
v. Grinding stones used to prepare paste/powder of spices and grains are made of sedimentary rock. False
vi. The earth, our homeland is a dynamic planet. True
Ans. The radius of the earth is 6371 km.
Ans. It is mainly made up of nickel and iron.
Ans. The innermost layer of the earth is the core.
Ans. The Red Fort is made of red sandstone.
Ans. The three layers of the earth are crust, mantle and core.
Ans. The uppermost layer over the earth’s surface is called the crust.
Ans. The uppermost layer of the Earth is called crust.
Ans. Latin word for igneous is Ignis meaning fire.
Ans. Latin word for sedimentary is sedimentum which means settle down.
Ans. Greek word for metamorphic is metamorphose meaning change of form.
Ans. The main mineral constituents of the continental mass are silica and alumina.
Ans. Any natural mass of mineral matter that makes up the earth’s crust is called a rock.
Ans. There are three major types of rocks: igneous rocks, sedimentary rocks and metamorphic rocks.
Ans. The crust forms only 1 per cent of the volume of the earth, 84 per cent consists of the mantle and 15 per cent makes the core.
Ans. The earth’s crust is made up of various types of rocks such as igneous, metamorphic, and sedimentary rocks.
Ans. The remains of the dead plants and animals trapped in the layers of rocks are called fossils.
Ans. When the igneous and sedimentary rocks are subjected to heat and pressure they change into metamorphic rocks.
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