Question

1)
5. Answer in brief.
a) What are rocks made up of?
b) Name the different types of rocks found on earth.
c) What type
of rock is formed by binding together and hardening of layers of sediments?
d) Which sedimentary rock under extreme heat and pressure transforms into marble?
Name two natural resources that even today fulfill most of our energy demands.​

Answer 1

Answer:

a) Rocks are made up of different minerals

b) Igneous rocks, sedimentary rocks, metamorphic rocks

c) Sedimentary rocks

d) Metamorphic rock

Petrol, coal

Explanation:

explained

Answer 2

a) Rocks are composed of grains of minerals, which are homogeneous solids formed from a chemical compound arranged in an orderly manner. The aggregate minerals forming the rock are held together by chemical bonds. The types and abundance of minerals in a rock are determined by the manner in which it was formed.

b) There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle. Sedimentary rocks are formed from pieces of other existing rock or organic material.

c) sedimentary rocks

Over a long period of time, the pieces become pressed together and form solid rock called sedimentary rock. Most sedimentary rocks form under water. Most of the earth has been covered by water some time in the past.

d) Limestone

Limestone, a sedimentary rock, will change into the metamorphic rock marble if the right conditions are met. Although metamorphic rocks typically form deep in the planet's crust, they are often exposed on the surface of the Earth.

e) Energy sources can be classified into two types: nonrenewable and renewable. Nonrenewable resources, such as fossil fuels and nuclear material, are removed from the earth and can be depleted. These resources have been the most used type of energy in the modern era.