Question

1. Answer the following questions.
(i) What are the three layers of the earth?
(ii) What is a rock?
(iii) Name three types of rocks.
(iv) How are extrusive and intrusive rocks formed?
(v) What do you mean by a rock cycle?
(vi) What are the uses of rocks?
(vii) What are metamorphic rocks?​

Answer 1

HEY FELLOW HERE IS YOUR

ANSWER:-

i) Crust, Mantle and Core

ii) A rock is a hard substance which is formed due to cooling of lava.

iii) Ingeous, Sedimentary and metamorphic

iv) Extrusive rocks are formed when lava is cooled above the Earth's surface whereas intrusive rocks are formed when lava is cooled below the Earth's surface.

v) The formation of rocks and conversation of rocks into soil and other form of rocks is called 'Rock Cycle'.

vi) Rocks are used in building structures and some rocks are used to make salt and soil.

PLEASE MARK AS BRAINLIEST

Answer 2

1. The Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life in the known universe. Earth's interior is generally divided into three major layers: the crust, the mantle, and the core.
2. A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed.
3. There are three kinds of rock: igneous, sedimentary, and metamorphic.
4. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.
5. The rock cycle is a concept used to explain how the three basic rock types are related and how Earth processes, over geologic time, change a rock from one type into another
6. Our use of rocks and minerals includes as building material, cosmetics, cars, roads, and appliances. In order maintain a healthy lifestyle and strengthen the body, humans need to consume minerals daily.
7. Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

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