Minerals
This term is used to describe items that come from living things.
Organic
This term refers to melted rock that remains underground.
Magma
Small particles of rock, sand, pebbles, leaves and shells are known by this name.
Sediment
Any type of rock can be morphed into metamorphic rock as long as it's given enough of this.
Heat and/or Pressure
This process allows solid rock to become liquid once again.
Melting
This type of test, usually done on a ceramic plate, involves finding the color of a mineral's powder.
Streak test
This word "igneous" comes from the Latin "ignis" which mean this.
Fire
This term is used to describe the squeezing of particle layers together from the weight of the ground above them.
Compaction
Metamorphic rocks that have no sort of grain arrangement are referred to by this term.
Nonfoliated
Of the three main types of rock, which is the only type that can contain fossils?
Sedimentary Rocks
The scratch test can allow geologists to determine the hardness of a mineral or where it falls on this scale.
Mohs Hardness Scale
Rocks that cool quickly typically have this type of grain.
Fine Grain
This type of organic sedimentary rock is burned as fuel...causing much pollution in the process.
Coal
Michelangelo's Statue of David was made from this type of beautiful metamorphic rock.
Marble
Rocks have their colors determined by these.
Minerals
Minerals that break apart unevenly are said to have a fracture. Minerals that break apart cleanly along a flat plane are said to have this property.
Cleavage
Rocks that cool within Earth's crust are referred to by this category.
Intrusive
Rocks formed from the crystallization of minerals dissolved in water are known by this name.
Chemical rocks
The sedimentary rock shale can be exposed to heat and pressure, which can morph it into this type of rock.
Slate
This process causes some sedimentary rocks to have visible layers.
Deposition
One of the most common types of crystal structures, this six sided pattern is exhibited by quartz.
Hexagonal
This type of igneous rock has been used for centuries for daggers and blades because of its tendency to chip off razor sharp edges.
Obsidian
Because of the calcite in this type of rock, statues made of this are very vulnerable to acid rain.
Limestone
This is the scientific term for the parent rock of a metamorphic rock.
Protolith
About how many rock-forming minerals make up most of the rocks in Earth's crust?
2 20 200 or 2000
20