Rocks & minerals
By: Avery chandler
Igneous=formed by magma that cools very quickly a example of this would be obsidian or pumis stone.
Metamorphic=formed by heat and pressure from deep under the earth
sedimentary=formed by sediment that has been pressed & weathered
this is when the rock or mineral has cracks that looks like they can be broke apart
did you know that the first model T ford had a mineral as its windshield? witch one do you think it is a) mica b) sodilite or c) quartz
DID YOU KNOW ROCKS CAN FLOAT
yes rocks can float for exaple pumis stone can float beacause of all its air bubbles and how light it is it kind of feels like foam because it is so light
mica was first used in car widsheilds it was used untill mica got too hard to find and they switched to what we have now glass.
there is a type of rock called peles hair it has basalt witch looks like brown glass and many hir like fibers.
ROCKS & MINERALS by: Dr.R.F.Symes and staff at the natural history museum in london