In the beginning, all rocks start as magma or lava. All of it is underground and released by volcanoes.
When the magma is released, it flows down the volcano and if it cools too quickly it becomes an Igneous rock.
Igneous rocks can sometimes look like glass and are also made when other rocks melt.
*Ring, Ring*
The rock cycle is where rocks go from one form to another under the right circumstances. I already talked about two forms, (Igneous and Magma) so we only have 2 more to go.
A few more hours later...
I didn't! (Also... whoare you?)
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Did you know that obsidian is an Igneous rock? Granite and diorite are good examples of Igneous rocks also.
This sidewalk is just a like sedimentary rock. They are made of sediments, (Small rocks or sand) that decompose from weathering and erosion. Sandstone would be a pretty good example.
Oh, and fun fact... Metamorphic and sedimentary rocks are very similar. Both being made of other rocks compacting and cementing.
Sedimentary rocks also contain fossils in most cases. One place you can find them is on the bottom of the sea-bed.
Metamorphic rocks are made when rocks experience heat and pressure and being crushed by one another underground, causing it to have ribbon-like layers. They also can also be crystals. Like gneiss and marble.
The End!
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