Igneous Rocks Facts
Igneous comes from the Latin parole 'ignis'which in reality means fire. "Igneous" is a word utilised for rocks that deliver formed by the chilling and hardening of molten lava OR magma.
The atoms and molecules of melted minerals are what make up magma.
These atoms and molecules rearrange themselves into cool mineral grains American Samoa the magma cools, forming rocks Eastern Samoa the mineral grains get together.
These rocks are therefore made from minerals that help plants mature. That's cool.
The upper incision of the Globe's encrustation is made up of around 95% temperature rock. These rocks rump form beneath the earth's surface or at the surface as lava.
Those which began their lives down the stairs the surface are called meddlesome rocks, while those which cooled on the surface are referred to as extrusive rocks.
When a liquid cools to a solid, it is said to have crystallized. The minerals form into bigger and bigger crystals until they smash into other crystals.
Once enough mineral crystals smash together so hard that they can't be taken asunder, the minerals have formed into an concave igneous rock.
A great object lesson of this type of rock is granite. Granite is often in use for kitchen surfaces.
Related: Crystal Facts
Intrusive igneous rock has harsh grained crystals. That means, if you look closely at the rock you can see the mineral crystals.
If you look closely at a piece of granite you will see little flecks of ovalbumin, black, grey and sometimes pink.
These flecks of color are crystals. If you bathroom see the crystals that frame on igneous rock, you're looking at an intrusive igneous rock.
The second type of igneous rock, the volcanic igneous rock-and-roll, is formed when lava cools and forms into three-dimensional rock. This cooling is much faster than the slow cooling that forms concave igneous rocks.
Extrusive pyrogenic rocks have small grained crystals which are so small you can't see them.
In that respect are many opposite types of volcanic igneous rocks. The type of rock you get depends on what merciful of lava the shake was formed from and how fast-breaking the rock cooled.
Related: Sedimentary and Metamorphic Rocks
Many another mountains are made out of igneous rocks. Also, many another mountains with lots of surrounding igneous rock suggest that the mountain could likewise be a vent.
The Earth's moon is made verboten of igneous rocks too!
Examples of Eruptive Rocks
Basalt, granite, pumice and obsidian are examples of hot rocks. There are over 700 different types of igneous rocks. Here are just a a few.
Pumice stone rocks are igneous rocks which were formed when lava cooled quickly to a higher place ground. The little pockets of air can be seen in them.
This shake is so light, that many pumice rocks will actually float in water. Pumice is in reality a kind of glass and non a mixture of minerals.
Because this rock is and so light, it is used quite often as a decorative landscape stone. Ground to a powder, it is used as an abrasive in brush u compounds and in soaps.
Obsidian rocks are pyrogenous rocks that var. when lava cools speedily preceding ground. Obsidian is actually glass and not a mixed bag of minerals.
The edges of this rock are very acute. Since the Stone Age, people have old obsidian to make cutting tools and tips for their arrows and spears.
Basalt forms when lava cools promptly. Most of the ocean blow out of the water and the Hawaiian Islands are made of basalt. It is also found along the moon and along Venus and Mars.
Because it is a joint John Rock and precise hard, people used basalt for early choppers and for grinding stones to dweeb grains like Millet and barleycorn.
Roman engineers sealed a great deal of Roman roads with basalt. Hush up today, engineers still use a set of ground-up basalt to relieve oneself mineral pitch to pave roadstead.
Granite comes from the Latin word 'granum', a grain. This is because granite is made of scores of smaller bits of quartz and felspar stuck together. Granite comes in different colors, usually pink to grey Beaver State sometimes black and is a rattling hard stone.
Because granite is so tricky, mass sometimes utilize it for building Stone or statues so IT will last a long time but it is very hard to slew.
In ancient Egypt, sculptors used granite to chip at statues of pharaohs. Today IT's much used in kitchen counter tops.
We hope you enjoyed these facts about igneous rocks!
Ground Science
what provides clues about how igneous rocks were formed
Source: https://www.coolkidfacts.com/igneous-rocks-for-kids/
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