Types of Rocks
Steps of the Giants Causeway in Ireland are made of
Basalt
white, very soft rock
talc
all rocks are made of one or more minerals
true
this type of rock is made of layers
sedimentary
this type of rock is made of melted rock
igneous
This rock is the hardest on the Mohs' scale
diamond
a floating rock used in soaps and cleansers
pumice
minerals are the building blocks of rocks
true
this type of rock forms under extreme heat and pressure
metamorphic
how long can it take for a rock to form?
millions of years
a black, glassy rock that cooled fast
obsidian
a sedimentary rock with quartz and feldspar
sandstone
The Mohs' Scale is used to rank a mineral's color
false (hardness)
A ___ is a trace of something that was once alive
fossil
the color of the powder a mineral leaves behind scratched on a white tile is
a metamorphic rock made from limestone used in flooring, hearths, monuments and statues
marble
a blue rock with a hardness of 8 on the Mohs' Scale
Topaz
The older the relative age of a rock layer, the higher it is found in a rock layer
false (lowest rock layers are the oldest)
These are used to identify minerals
properties
above
a banded rock that started out as granite
gneiss
a sedimentary rock used to make bricks, china and pottery
shale
false (smooth rocks cool quickly)
Name the four properties of minerals
color, hardness, luster, streak
Name three uses of rocks
jewelry, soaps, statues, floors, counters, monuments, hearths, china, pottery, bricks