Chemical rocks are based on their composition ie. what they are composed of. What separates chemical from biochemical is whether there is any organic matter like shells or plant fragments present.
Rock are primarily classified on how they were formed:
1. Igneous rocks were formed by heat from magma (melted rock).
2. Sedimentary rocks were formed from layer after layer of deposits laid down on the bed of a body of water, and changing to solid rock over thousands of years.
3. Metamorphic rock is formed from existing rock that is subjected to high heat and high pressure over a period of time.
Rocks are classified by their mineral and chemical compositions. The continuous transformation of one rock type to another forms the rock cycle.
The types are based on their particular method of formation: igneous from melt, sedimentary from lithified sediments, and metamorphic--altered by heat and/or pressure.
How rocks changes
composition and texture
they are classified by how they are classified
Both organic sedimentary (like coal) and chemical sedimentary (like rock salt) rocks are not composed of particles of other rocks. They are different because organic rocks are composed of the remains of living things but chemical rocks are formed by inorganic processes such as evaporation.
by their kingdoms by a five knigdom classification system which classifies all organisms
Emotion
inductive reasoning
Based on their method of formation.
A rock is an agglomeration of different minerals. Minerals are classified into categories based on their chemistry: oxides, sulphides, silicates, carbonates etc. Rocks are classified primarily by the process that formed them: igneous, sedimentary, or metamorphic.
A rock is an agglomeration of different minerals. Minerals are classified into categories based on their chemistry: oxides, sulphides, silicates, carbonates etc. Rocks are classified primarily by the process that formed them: igneous, sedimentary, or metamorphic.
No, igneous rocks are not classified by their shape. They are primarily classified based on their origin (either intrusive or extrusive) and their texture (coarse-grained, fine-grained, glassy, etc.). Shape or form is not a major factor in the classification of igneous rocks.
texture
Igneous rocks can be classified by their method of formation and by their mineralogy.
Igneous rocks can be classified by their method of formation and by their mineralogy.
particle size
Metamorphic rocks are classified by foliation or lack there of, not sedimentary rocks. They are classified into Clastic Sedimentary, and Chemical Sedimentary.
they are classified into 3 major kinds of rocksthey are the ;IGNEOUS ROCKS,SEDIMENTARY ROCKS,AND METAMORPHIC ROCKS
Sedimentary Rocks are classified based on some criterials, such as Origin and Mode of formation. Sedimentary Rocks can be classified into 3 as follows; 1. Clastic Sedimentary Rock. eg. Sandstone. 2. Organic Sedimentary Rock. eg. Limestone. 3. Chemical Sedimentary Rock. eg. Gypsum.
Geologists classify rocks by where they are formed; above ground or under ground