Information About Rocks
Rocks are not things that chill around and be lazy. They’re useful. They're useful for making a fire, for building and some are used for weapons. In the old days,the maori people used rocks for many things such as knives,weapons,axes and they used rocks to cook (and they still do in hangis).Around the world heaps of rocks are found,everyday,in every size and in different forms.There are three main types of rocks called sedimentary rocks,metamorphic rocks and igneous rocks.
#1 Sedimentary. Sedimentary rock is formed when little bits of rock (sediment) goes down into streams from air,ice,wind and gravity or water flows carrying the sediment in a mixture of water and debris.This sediment is often formed when weather or water waves break down a rock into loose material in a part of the area.
#2 metamorphic. They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks. Sometimes, metamorphic rocks are formed when rocks are close to some melted rock,so it gets heated up. Remember that metamorphic rocks are not made from volcanic rocks. (Rocks that do melt form igneous rocks instead.)
#3 igneous. Igneous rock is formed through the cooling of magma or lava to a solid. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic)rocks or on the surface as extrusive (volcanic)rocks.(Igneous is another word for fire.Igneous is latin for a fire rock.
In summary, rocks are found everywhere,in many shapes,sizes and colours and rocks have many uses.The three main types of rocks are sedimentary,metamorphic and igneous.And remember the cool thing about rocks is that it looks like they’re lazing around but they are actually on the move due to the cycle of weathering.
Question Time !!!
Q1. What are the three main rock types
Q2. Since when did we start using rocks
Q3. How are Igneous rocks formed
Q4. Which rock is formed by air,ice,wind and gravity or water
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