the softest (#1) being talc, and the hardest (#10) being diamond. nothing else can scratch diamond.
is the ability to reflect light. This may be dull, shiny, or pearl-like.
it is the dust-trail left by a mineral when it is rubbed across a piece of porcelain.
a mineral's ability to break along straight lines.
a natural magnet
rare, beautiful, and very expensive?
mineral content and their texture
How are rocks identified
molten (melted) rock
melted rock called below the grownd
melted rock called above grownd
intrusive igneous rock
rock that cools below the surface
extusive igneous rock
rock that hardens above ground from lava
rocks formed from fragments or organic matter (from living things)
clastic sedimentray rocks
made from other rocks that are stuck together
rocks that are changed by heat and pressure
changes any of the three main rocks from one to another
any material that we have natural or man-made
they can be replaced by nature at a rate close to the rate at which they are used
renewed very slowly or not at all
coal, oil, and natural gas
what are the three fossil fuels