American Geosciences Institute
American Geosciences Institute: Earth Science Week: Ring of Fire
Learners identify plate boundaries as well as continents, countries, and bodies of water to become familiar with an area known as the "Ring of Fire."
University of Oregon
The Electronic Universe Project: Plate Boundaries/plate Tectonics
Visit this site to learn more about the different types of plate boundaries. Includes color pictures and easy-to-understand examples of how and why plates move the way they do.
Physics Classroom
The Physics Classroom: Refraction/ray Model of Light: Image Formation Revisited
Students take an in-depth look at the physics behind image formation.
Curated OER
National Park Service: What on Earth Is Plate Tectonics?
An easy-to-understand explanation of what plate tectonics is. Contains information about the inner parts of the Earth, the difference between the three types of plates, and numerous maps and illustrations.
Math Open Reference
Math Open Reference: Comparison Test
Learn about comparison tests with this helpful reference tool. Provides a detailed definition and examples that enhances further explanation. Includes links to related topics.
Ducksters
Ducksters: Earth Science for Kids: Plate Tectonics
This site helps students learn about the Earth science subject of plate tectonics including major and minor plates, convergent, divergent, and transform boundaries.
Other
Shippensburg University: The Root Test
This site provides a brief overview of the root test, presenting one sequence with converges absolutely and one which diverges.