Study Guides
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41.
Igneous Rock Practice Test
If necessary, review: Igneous Rocks Help Intrusive Igneous Rocks Help ...
Source: McGraw-Hill Professional -
42.
Intrusive Igneous Rocks Help
Intrusive Igneous Rocks The cooled, crystallized magma that forces its way into the surrounding unmelted rock masses deep in the Earth is called intrusive igneous rock . It can be identified by its interlocking large crystals (grains ...
Source: McGraw-Hill Professional -
43.
Extrusive Igneous Rock Help
Extrusive Igneous Rock Once magma exits the crust (ejected during an eruption) and cools rapidly, it creates a finely textured or glassy rock with small crystals. Basalt is an example of igneous rock that is quickly cooled from magma and ...
Source: McGraw-Hill Professional -
44.
Igneous Rock: Felsic and Mafic Help
Introduction to Felsic and Mafic Rock Igneous rocks are divided into two types depending on composition: felsic and mafic . Felsic rock is affected by heat, either from magma coming to the surface from extreme depths in the ...
Source: McGraw-Hill Professional -
45.
Crystallization Help
Crystallization Since most magmas form in the upper mantle, their composition is mostly silica (SiO 2 ) with different amounts of iron, calcium, sodium, potassium, aluminum, magnesium, and other trace elements. The crystallization ...
Source: McGraw-Hill Professional -
46.
Magnetism Help
Magnetism Certain minerals, the most important of which is magnetite , can become permanently magnetized. This comes about because the orbiting electrons around a nucleus form an electric current and create a very small magnetic ...
Source: McGraw-Hill Professional -
47.
Sedimentary Rock Practice Test
If necessary, review: Sedimentary Rock Formation Help Types of Sedimentary ...
Source: McGraw-Hill Professional -
48.
Types of Sedimentary Rock Help
Types Of Sedimentary Rocks Unlike igneous rock, most sedimentary rocks have a fine-grained texture. Since a lot of the reason they have layered or settled in one place is due to water or wind, the particles of sediment are usually small and fine.
Source: McGraw-Hill Professional -
49.
Carbonate Sedimentary Rocks Help
Carbonate Sedimentary Rocks Carbonate rocks all have carbon-related compounds in their composition. The two most important minerals found in carbonate rocks are: Calcite (CaCO 3 ) ...
Source: McGraw-Hill Professional -
50.
Siliceous Rocks Help
Siliceous Rocks This type of sedimentary rock is commonly formed from silica-secreting organisms such as diatoms , radiolarians , or some types of sponges. It is most commonly called diatomaceous earth . Many expert ...
Source: McGraw-Hill Professional
