Rocks
How is igneous rock formed?
Hardened lava or magma
A scientist who studies fossils
a paleontologist
A fossil that is less than 1mm in size
Microfossil
A scientist who studies classification and origin of all types of rocks is called a what?
Petrologist
Three forms of coal ordered in increasing carbon content
Lignite, bituminous coal, and anthracite
How is sedimentary rock formed?
Formed from eroded rock and soil particles compacted and cemented together.
What is a fossil?
The remains of once living things that have been preserved
A thin covering left when heat and pressure destroy most of the buried remains on a plant or animal
Carbon print
What two elements are hydrocarbons formed from
Hydrogen and Cabon, CH3
The law that states that all earth's matter is not created nor destroyed, just changes form
The Law of Conservation of Matter
The majority of fossils that are found are what type of creatures?
Marine organisms
A fossil that shows a path or route where organisms have gone
Trace
A type of rock with no grain that is smooth and shiny.
Obsidian
A mixture of hydrocarbon gases and is often found with crude oil
Natural Gas
Metamorphic rock that contains grains that appear to be aligned in a more or less parallel pattern is what type of metamorphic rock?
Foliated
What are index fossils.
A fossil that regularly appears in certain layers of the geologic column.
Mineralized form of tree sap containing fossils
Amber
How is metamorphic rock formed?
Heat and pressure that changes any kind of existing rock to Metamorphic rock.
A fluid fossil fuel also called crude oil
Petroleum
Difference between intrusive and extrusive igneous rocks.
Intrusive were cooled inside the earth, extrusive outside
The individual rock particles, crystals, and occasionally fossils that combine to give rock it's texture known as what?
Grains
The mineral replica created when dissolved minerals replace the hard parts of wood through a process called replacement.
Petrified Wood
A type of rock that is light and can float in water?
Pumice
A solid fossil fuel
Coal