Classifying Rocks
A natural, solid mixture of minerals or particles is called this.
What is a rock?
Igneous rock that formed from magma and cooled very slowly UNDERNEATH the earth's surface is called this.
What is Intrusive igneous rock?
These small pieces or particles make up sedimentary rock. They can be other rocks or plant and animal organisms.
What are Sediments?
The two processes that create metamorphic rocks
What are extreme heat and pressure?
Geologists classify rocks into these 3 major groups.
What are igneous, sedimentary, and metamorphic rocks?
The type of rock that forms from magma or lava cooling is termed this.
What is igneous rock?
This type of rock is formed from lava ON the earth's surface.
What is Extrusive igneous rock?
This shows any trace of past life trapped in sedimentary rock.
What is a Fossil?
These types of rocks can become metamorphic rocks.
What are igneous, sedimentary, and other metamorphic rocks?
Prior to becoming igneous rock, this process must occur to any rock.
What is Melting?
Part of earths crust that is approximately 4-7 miles thick and is the youngest type of rock
What is oceanic crust/rock?
An igneous rock containing large crystals is most likely
What is an intrusive rock?
The time taken for sedimentary rocks to form
This occurs when magma comes in contact with existing rock and starts to melt the rocks initial properties
What is Contact metamorphism?
A rock transforms into sediment by this process.
What is Weathering?
The three groups of rocks are classified by
What is how they form?
This type of extrusive igneous rock is black with a glassy texture.
What is obsidian?
An organically formed brownish-black sedimentary rock
What is coal?
This January birthstone is a dark ruby-colored metamorphic gemstone.
What is Garnet?
The process in which sediment is taken AWAY by streams, rain, wind, or human processes.
What is Erosion?
The series of processes that change one type of rock into another type of rock is called this.
What is the rock cycle?
This igneous rock is very light and can float in water. It also has holes due to the release of gases and is used as an abrasive. It is commonly used to scrub dead skin off feet and is a common beauty product.
What is pumice?
The crystallization of minerals from water into the spaces between sediment grains that makes sedimentary rocks stick together is called this.
What is Cementation?
This typically happens when rocks are deep underground and they are subjected to massive pressure — so much so that they often become elongated, destroying the original features.
What is regional metamorphism?
A geological process in which sediments, soil, and rocks are added to a landform or landmass.
What is Deposition?