- Igneous rocks are formed when lava (magma) cools and turn to solid rock.
The magma comes from the Earth’s core which is
molten rock .
The core makes up about 30% of the Total Earth Mass a(31.5%) - Obsidian is nature’s glass. It forms when lava cools quickly on the surface. It is glassy and smooth.
- Pumice is full of air pockets that were trapped when the lava cooled when it frothed out onto the surface. It is the only rock that floats.
SEDIMENTARY
ROCKSWhen mountains are first formed, they are tall and jagged like the Rocky
Mountains on the west coast of North America. Over time (millions of years)
mountains become old mountains like the Appalachian Mountains on the east coast of Canada and the United States. When mountains are old, they are rounded and much lower. happens in the meantime is that lots of rock
gets worn away due to erosion. Rain, freeze/thaw cycle, wind and running water cause the big mountains crumble a little bit at a time.Eventually most of the broken bits of the rock end up in the streams & rivers that flow down from the mountains.
These little bits of rock &
sand are called sediments.
When the water slows
down enough, these sediments settle to the bottom of the lake or oceans they run
into.
Over many years, layers of different rock bits settle at the bottom of
lakes and oceans.Think of each layer as a page in a book. One piece of paper is not heavy.
But a stack of telephone books is very heavy & would squish anything
that was underneath.
Over time the layers of sand and mud at the bottom of
lakes & oceans turned into rocks.
These are called sedimentary rocks.Some examples of sedimentary rocks are sandstone and shale.
Sedimentary rocks often have fossils in them.
I love your rocks information its FANTASTIC! well done harjun.
sorry I mean Bismah.
These are really interesting facts Bismah.
Bismah I have notice that you are improving with your writing is so clear to read.
Because your writing is so clear and you got interesting facts I even did some research at home
WELL DONE BISMAH YOU DID A GREAT FAB EFFORT!
GREAT INFORMATION IT HELPS ALOT OF PEOPLE I EVEN DID A LITTLE RESEARCH MYSELF!