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.

Review your understanding of the big ideas under the topic of igneous rocks.

In this lesson, 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 Project...

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

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.

Fourth graders identify rock types by observing key characteristics.

Did you know the rock cycle is a continuous cycle that takes hundreds of millions of years? This webpage explains how sedimentary, metamorphic, and igneous rocks are formed. It also gives examples of each type of rock. Also includes a...

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...

The purpose of this lesson is to introduce students to the basic elements of our Earth's crust: rocks, soils and minerals. They learn how we categorize rocks, soils and minerals and how they are literally the foundation for our...

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

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

Welcome to Devil's Tower National Park in Wyoming! This highly interactive website reveals the geological processes behind the formation of this unique natural structure.