1. What are minerals?
2. Why are igneous rocks called primary
rocks?
3. Give two uses of rocks.
4. What is a rock cycle?
Answers
Answer:
Q.1
Minerals are solid substances that are present in nature and can be made of one element or more elements combined together (chemical compounds). Gold, Silver and carbon are elements that form minerals on their own. ... For example, rock salt or kitchen salt is a mineral formed of cubic-shaped crystals.
Q.2
Rocks which are formed by solidification of magma are known as primary rocks. Igneous rocks are considered as the primary rocks as these are the rocks which form from the material that comes from below the earth. Igneous rocks are one of the three basic rock types. Other two are sedimentary and metamorphic.
Q.3
Rocks and minerals are all around us! They help us to develop new technologies and are used in our everyday lives. Our use of rocks and minerals includes as building material, cosmetics, cars, roads, and appliances.
Q.4
The rock cycle is a process in which rocks are continuously transformed between the three rock types igneous, sedimentary and metamorphic. ... If the sediments are buried under further layers of sediment, they can become lithified to produce a sedimentary rock. Magma is produced when rocks are melted.
Answer:
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form. The geological definition of mineral normally excludes compounds that occur only in living beings.
Igneous rocks- formed by the cooling and solidification of magma (molten rocks). It begins the rock cycle. So, it is known as primary rocks.
Making Cement (Limestone) (Sedimentary Origin)
Writing (Chalk) (Sedimentary Origin)