Rocks & minerals

By: Avery chandler

Igneous

Igneous=formed by magma that cools very quickly a example of this would be obsidian or pumis stone.

Metamorphic

Metamorphic=formed by heat and pressure from deep under the earth

Sedimentary

sedimentary=formed by sediment that has been pressed & weathered

cleveage

this is when the rock or mineral has cracks that looks like they can be broke apart

FUN FACT

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

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.

THE HARDNESS SCALE

1 talc 2 gypsum 3 calcite 4 flourite 5 apatite 6 orthoclase 7 quartz 8 topaz 9 corundum and finnally 10 the diamond

HAIRY ROCKS

there is a type of rock called peles hair it has basalt witch looks like brown glass and many hir like fibers.

RESOURCES

ROCKS & MINERALS  by: Dr.R.F.Symes and staff at the natural history museum in london