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Facts About Igneous Rocks

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Level 1 Igneous Rocks

L1 Igneous Rocks textbookL1 Igneous Rocks

Our Level 1 Igneous Rocks textbook includes twelve lessons about volcanic rocks. Lesson topics include Where Igneous Rocks Form, Crystal Size, Lava Rocks and Lava Tubes.  Each lesson contains 2-3 pages of written material of facts about igneous rocks, a quiz and an elementary science activity.

Myrna Martin introduces each lesson in the textbook on a video that can be purchased with our packages and courses. Myrna covers not only the main points in the lesson she also includes extra information on the topic that is not contained in the written material.

The elementary science activities are fun and easy to do in this textbook. Lesson activities include Building Crystals, Rock Trees, Mineral Concentration, Weighty Rocks and Granite Cookies.

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Level 1 Igneous Rocks textbook

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Level 1 Igneous Rocks textbook

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Teacher’s Edition Textbooks

The teacher’s textbook is an exact copy of the student textbook. It includes the answers to the quizzes on each quiz page. A Teacher’s Notes page is located before each lesson with the following information

1. Lesson Content
2. Lesson Objectives
3. Activity information and materials needed
4. Vocabulary and definitions
5. Correlation with the National Science Standards

Facts About Igneous Rocks

Some facts about igneous rocks you might not know. Igneous rocks are one of the three major types of rocks found on the surface of the Earth. Igneous rocks form when magma (molten rock) cools either below the Earth’s surface or erupts onto the Earth’s surface during a volcanic eruption. Pyroclastic rock is a general term used to describe all rocks that form during volcanic eruptions. Intrusive rock is a general term used to describe all rock that cooled beneath the Earth’s surface.

Igneous Rock Classifications

Igneous rocks are classified by their percentage of silica (quartz) and the location where they cooled into solid rock. Tephra are igneous rocks that were airborne. Lava rocks formed during a volcanic eruption in a lava flow. Intrusive rocks were once molten and cooled before reaching the Earth's surface.

The RATZ program at Arizona State University is a project to create a collection of rocks found worldwide including all types of igneous rocks.

Rock Forming Minerals

Basalt covers all the ocean floors. Common minerals in basalt include olivine, augite, plagioclase feldspars, pyroxene and magnetite. These minerals are primarily rich in iron.

Andesite is usually a gray color because it is a mix of light and dark minerals. The rock is named for the Andes Mountains in South America. Minerals found in andesite include plagioclase, pyroxene and hornblende.

Rhyolite is a light colored igneous rock containing at least 70% silicon dioxide. Rhyolite minerals include quartz, sanidine, and plagioclase, hornblende and biotite mica.

More Level 1 Textbook Links

Level 1 Textbooks

Earth Science

Igneous Rocks

Sedimentary Rocks

Metamorphic Rocks


Rock & Mineral ID Field Guide

Rock Cycle



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