Question

A. Answer the following questions in bri
1. What is a rock ?
2. Name three types of rocks.
3. What is magma ?
4. What are primary rocks?
5. What are secondary rocks ?
6. What is the major basis of classification of rocks?
7. Which rocks are called the primary rocks and why?
8. What are the chief characteristics of the igneous rocks ? Mention any two
9. Mention any two characteristics of sedimentary rocks.
10. What are intrusive and extrusive igneous rocks?
11. Name the process through which metamorphic rocks are formed. Give any twe
rocks.
12. What is rock cycle ?
13. "All agricultural production on the surface of the earth depends indirectly upon t
14. Name two rocks used as important building materials.
Answer the following questions in detail :
4​

Answer 1

Answer:

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. Rocks are usually grouped into three main groups: igneous rocks, metamorphic rocks and sedimentary rocks

2Ans:There are three kinds of rock: igneous, sedimentary, and metamorphic.

3Ans:very hot liquid rock found below the earth’s surface.

4ans:Primary rock is an early term in geology that refers to crystalline rock formed first in geologic time, containing no organic remains, such as granite, gneiss and schist as well as igneous and magmatic formations from all ages.

Answer 2

Answer

1. A rock is a solid collection of mineral grains that grow or become cemented toge her Some rocks are large while others are small...

2. There are three kinds of rock

Igneous, sedimentary, and metamorphic

3. Magma is extremely hot liquid and semi-liquid rock located under Earth's surface.... This magma can push through holes or cracks in the crust, causing a volcanic eruption. When magma flows or erupts onto Earth's surface, it is called lava. Like solid rock, magma is a mixture of minerals.

4. Primary rock is an early term in geology that refers to crystalline rock formed first in geologic time, containing no organic remains, such as granite, gneiss and schist as well as igneous and magmatic formations from all ages.

5. Rocks composed of particles derived from the erosion or weathering of preexisting rocks, such as residual, chemical, or organic rocks formed of detrital, precipitated, or organically accumulated materials; specif. clastic sedimentary rocks.

6. The classification of rocks is based on two criteria, TEXTURE and COMPOSITION. The texture has to do with the sizes and shapes of mineral grains and other constituents in a rock, and how these sizes and shapes relate to each other. Such factors are controlled by the process which formed the rock.

7. Igneous rocks are often called primary rocks because they are at the start of the rock cycle. Their parent material is not sediment or fragments of.

8. The main characteristics of an Igneous rock are crystal size (grain size) and texture. The main characteristics of an Igneous rock are crystal size (grain size) and texture. Since water does not penetrate the rocks easily and hence igneous rocks are less affected by chemical weathering.

9. Sedimentary rocks are largely found on the Earth's surface. They cover 75% area of the Earth. These rocks are generally not crystalline in nature. They are soft and have many layers as they are formed due to the deposition of sediments.

10. The two main categories of igneous rocks are extrusive and intrusive. 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.

11. They can form from tectonic processes such as continental collisions, which cause horizontal pressure, friction and distortion. They are also formed when rock is heated by the intrusion of hot molten rock called magma from the Earth's interior.

12. The rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. Each rock type is altered when it is forced out of its equilibrium conditions

13. All agricultural production depends on the surface or the rocks because over the years, the place of the rock is determined by the climate and the weather of the place

14.Granite.

Sandstone

Slate