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There are 3 main types of rocks:
Igneous Rocks
Forms when molten rock cools.
2 types of molten rock: magma, and lava.
- Intrusion: Forms when magma cools. Intrusion rocks take longer to form because magma takes longer to cool. Magma is under the Earth's surface, and it is very hot there. Imagine how long it would take for magma to cool down somewhere a thousand degrees!
- Extrusion: Forms when lava cools. Extrusion don't take as long to form, because lava cools much faster than magma does. Lava is at the surface, and the surface is WAY cooler than underground.
Sedimentary Rock
Forms when rocks/minerals/remains of plants or animals settle and accumulate.
Forms in layers.
3 types of sedimentary rock:
- Clastic - forms from accumulation of rock fragments and minerals.
- Biologic - forms from plant or animal remains.
- Chemical - forms when minerals precipitate out of a solution.
Metamorphic
Preexisting rocks that have changed form by heat and pressure.
If you are looking for specific types, here are some brief examples:
Igneous Rocks
Basalt
Pegmatite
Granite
Tuff
Sedimentary Rocks
Limestone
Coal
Shale
Siltstone
Metamorphic Rocks
Slate
Gneiss
Schist
Marble
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∙ 11y ago
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Why do rocks have different colors?
Rocks have different colors because some rocks contain different minerals. the rocks
Are rocks made out of different kind of minerals?
Almost all rocks made of minerals, but different rocks contain different mixtures of minerals.
Do all rocks weather the same way?
Erosion rates depend on the composition of the rocks and how they are attacked by the environment.Different kinds of rocks have different composition and will erode at different rates.Rocks in different places will be affected differently by wind, water, ice, rain, pollutants, etc. and so they will erode at different rates.
Are rocks the same as minerals?
Rocks are normally combinations of different minerals.
What cause rocks to change into different rocks?
rocks change form in a process called the rock cycle
Why do rocks have different colors?
Rocks have different colors because some rocks contain different minerals. the rocks
How the rocks are different from rocks associated with plate-boundary orogeny?
How are what rocks different?
what describes the compostition of rocks?
Rocks are made up of minerals. Different rocks consist of different minerals in different proportions.
How are the three different types of rocks different?
Each of the rocks form in a different way.
Rocks in different countries?
Each country has many different rocks.
Are rocks made out of different kind of minerals?
Almost all rocks made of minerals, but different rocks contain different mixtures of minerals.
How are the three major rocks are different?
Each of the rocks form in a different way.
What is the formulae for rocks?
There are thousands of different types of rocks...What type of rocks in particular?
Why are rocks not the same?
Because different rocks are formed by different processes and made up of different mineral assemblages.
Do rocks have elements?
Yes but different sorts in different rocks and in the form of compounds as well as elements.
How many rocks are ther?
There are thousands of different types of rocks.
Why do rocks move in different directions?
First of all, why would rocks move in different directions? Even though rocks could move in different directions, it is not possible for them to move on their own. Rocks have to have force applied to them in order to move.
