Get igneous rock reviews and study guides here. Learn about igneous rock or brush up on your skills. Thorough explanations and practice examples will help you review earth science.

Study Guides

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  • 1.

    Igneous Rock Help

    Introduction to Igneous Rock Unlike plants and animals, most rocks have long histories. They seem ancient and never changing because within our lifetimes, they don’t change much. A rock is a rock is a rock. Igneous rocks, ...

    Source: McGraw-Hill Professional
  • 2.

    Igneous Rock Practice Test

    If necessary, review: Igneous Rocks Help Intrusive Igneous Rocks Help ...

    Source: McGraw-Hill Professional
  • 3.

    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
  • 4.

    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
  • 5.

    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
  • 6.

    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
  • 7.

    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
  • 8.

    Types of Rocks Study Guide

    Introduction The dynamic earth churns new matter up to its surface and returns other matter back down to the mantle. Through all this activity, including through the actions of water and wind as well as deposition of sediments to form new types of rock, continents ...

    Source: LearningExpress, LLC
  • 9.

    Types of Rocks Practice Questions

    Review the following concepts: Types of Rocks Study Guide Practice Questions 1. Which of the following are the two most abundant elements in Earth's crust?

    Source: LearningExpress, LLC
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