Learn about the different types of igneous rocks and how they are classified.

[Free Registration/Login may be required to access all resource tools.] Describes the features of intrusive and extrusive igneous rocks that cool slowly and rapidly, respectively.

In this lesson plan, students will be given a brief overview of the rock cycle. Students will then focus on igneous rocks and how they are formed. This lesson plan was created as a result of the Girls Engaged in Math and Science, GEMS...

This site explores the classification of igneous rocks. Content addresses classification based on color and texture, mineral composition, and chemical composition.

Explains the difference between intrusive and extrusive igneous rocks and provides pictures and descriptions of common igneous rock types in each category.

[Free Registration/Login may be required to access all resource tools.] Presents the classifications of igneous rocks based on silica content.

Gain an understanding of the cycles that form metamorphic, sedimentary, and igneous rocks.

Learn about the make-up and causes of igneous rock.

Click on the shelves in this virtual exhibition to learn about the many rocks and minerals that we use in our everyday lives.

[Free Registration/Login Required] This PDF passage "If Rocks Could Talk!: Obsidian" from the American Museum of Natural History features an interview with an igneous rock named Obsidian. It is part of a paired text with "If Rocks Could...

Use crayons to model the rock cycle in this fun activity! You will make colorful sedimentary, metamorphic, and igneous "rocks" from crayon shavings.

Learn about various rock types and the rock cycle.

Rocks cover the earth's surface, including what is below or near human-made structures. With rocks everywhere, breaking rocks can be hazardous and potentially disastrous to people. Students are introduced to three types of material...

In-depth resource for identifying rocks. Includes an interactive rock identification key to help you figure out the name of your rock.

If you want to plant a class garden, this is a great resource for combining geometry, Native American studies, and rocks.

Looking for more information about plate tectonics and what happens at plate boundaries? This site gives definitions of all plate boundaries as well as animations to help visualize what is happening.

Explains what granite it, and has an alphabetical listing of different types of granite, with pictures and details.

Visit an active volcano site to find out the connection between the movement of the Earth's plates and the processes deep within the Earth's interior. [58:23]