WGU C926: Earth: Inside and Out

Getting Oriented: What C926 Earth: Inside and Out Is About

C926 Earth: Inside and Out is a geology and earth-systems content course that sits inside WGU's science education programs, in the School of Education. If you are working toward a science teaching credential, this is one of the content courses that builds the subject-matter knowledge you will eventually teach. Rather than focusing on lesson planning, it asks you to actually understand how our planet works: how it formed, what it is made of, and the forces that keep reshaping it.

Direct answer: To pass C926, learn the core earth-science story cold: Earth's internal structure, plate tectonics, the rock cycle, geologic time, and the surface processes that shape landscapes. Work through the WGU learning resources section by section while quizzing yourself out loud, then use the pre-assessment to expose weak spots before you schedule the real exam.

The official WGU catalog describes the course as an exploration of how our dynamic planet evolved and the processes and systems that continue to shape it. It notes that although the geologic record is ancient, it has only been studied intensely since the late nineteenth century, and that fields such as geologic time, plate tectonics, climate change, deep-sea floor exploration, and the inner Earth have transformed our understanding of geological processes. In WGU's records the course is listed as GEOS 5513 and carries 3 competency units.

One practical note before you start: WGU periodically restructures its earth-science and science-education courses, and the exact code, title, or resources tied to your term may differ from an older syllabus you find online. Always treat your current Course of Study in the WGU portal as the authority, and confirm the code with your program mentor.

What the Assessment Measures

C926 is evaluated through an objective assessment: a proctored exam you schedule once you feel ready. The questions check whether you understand earth-science concepts and can reason about them, not whether you have memorized trivia. Based on the catalog description and the standard scope of an introductory geology course, expect the material to cluster around themes like these:

• Earth's interior and structure — the crust, mantle, and core, and how we know what lies beneath the surface.
• Plate tectonics — plate boundaries, seafloor spreading, subduction, and the evidence that ties continents and oceans together.
• Minerals and the rock cycle — how igneous, sedimentary, and metamorphic rocks form and transform.
• Geologic time — relative and absolute dating, the geologic time scale, and reading Earth's history from the rock record.
• Surface processes — weathering, erosion, deposition, and the way water, ice, and wind sculpt landforms.
• Earth hazards and dynamics — earthquakes, volcanoes, and the internal forces driving them.
• Earth systems and change — how Earth's spheres interact and how processes, including climate change, reshape the planet over time.

Because WGU updates resources over time, treat this as a map of the terrain rather than an exact blueprint. Your course materials and the objectives list in your portal define precisely what is fair game.

How Demanding Is C926, and How Long Should You Plan For?

Difficulty in a course like this depends heavily on your background. If you have taken a geology or earth-science class before, much of the content will feel like review and you can move quickly. If earth science is new to you, the volume of vocabulary and the number of interlocking processes can feel heavy at first, especially plate tectonics and the rock cycle, which show up throughout the exam.

Many WGU students report that content courses in this range are very manageable when studied steadily, and that the biggest risk is underestimating the terminology rather than the reasoning. A realistic plan for most working adults is a few focused weeks, studying most days for shorter, consistent sessions rather than cramming. Because it is a 3-CU course, it is lighter than the larger capstone or methods courses in your program, but it still rewards genuine understanding. Give yourself enough runway to take the pre-assessment, review what it flags, and then sit the real exam with confidence.

A Study Plan Built for Earth Science

Earth science is a subject where a few strong strategies pay off far more than passive re-reading. Try structuring your prep like this:

• Anchor everything to plate tectonics first. It is the unifying theory of the course. Once you can explain why earthquakes, volcanoes, mountain ranges, and seafloor features appear where they do, dozens of other facts click into place. Spend your first sessions here.
• Use active recall, not highlighting. After reading a section, close the material and explain the concept aloud as if teaching it — which is, after all, your future job. If you cannot narrate how a metamorphic rock forms, you do not yet know it. This retrieval practice is far stronger than rereading.
• Space your reviews. Revisit older topics on a rolling schedule instead of studying each unit once and moving on. Earth science has a lot of interrelated vocabulary, and spaced repetition keeps terms like "subduction," "orogeny," and "unconformity" from blurring together.
• Draw the cycles. Sketch the rock cycle, the geologic time scale, and a cross-section of Earth's interior from memory. Diagrams force you to show relationships that multiple-choice questions love to test.
• Treat the pre-assessment as a diagnostic. Take it early enough that you still have time to fix gaps. Note every topic you miss, restudy just those, and only schedule the proctored exam once your practice results are consistently strong.

Where Students Go Wrong in C926

A few avoidable mistakes account for most retakes in courses like this:

• Memorizing labels without understanding processes. Knowing the word "convergent boundary" is not the same as explaining what happens there. The exam favors reasoning, so learn the mechanisms.
• Skipping the pre-assessment or taking it too late. It is the single best predictor of readiness. Ignoring it, or taking it the day before the exam, wastes your most useful feedback.
• Confusing relative and absolute dating. These come up often and are easy to mix up under time pressure. Nail the distinction early.
• Cramming vocabulary the night before. Earth science has too many terms to absorb in one sitting; spacing them out over the whole prep window works far better.
• Relying on outdated third-party study guides. Old guides floating online may reference a different course version. Prioritize your current WGU resources.

C926 Readiness Checklist

Before you schedule the proctored exam, make sure you can honestly say yes to most of these:

• Can you explain plate tectonics and describe what happens at convergent, divergent, and transform boundaries?
• Can you sketch Earth's internal layers and describe the properties of the crust, mantle, and core?
• Can you walk through the rock cycle and explain how igneous, sedimentary, and metamorphic rocks form?
• Can you distinguish relative dating from absolute dating and place major events on the geologic time scale?
• Can you connect earthquakes and volcanoes to the tectonic settings that cause them?
• Can you describe how weathering, erosion, and deposition shape surface landforms?
• Can you explain how Earth's systems interact and change over geologic time?
• Have you taken the pre-assessment and reviewed every topic it flagged?

C926 FAQ

Is C926 an objective assessment or a performance assessment?

C926 is assessed through a proctored objective exam rather than a written performance task. You schedule it when you are ready, and it tests your understanding of earth-science concepts. Always confirm the current format in your Course of Study, since WGU updates course structures over time.

How many competency units is C926 worth?

WGU's institutional catalog lists Earth: Inside and Out as a 3-competency-unit course, coded GEOS 5513. It is one of the lighter content courses in the science education programs, but it still requires real subject mastery.

How long does it take to finish C926?

It varies with your background. Many students report that a course of this size takes a few focused weeks of steady study. If earth science is new to you, plan for more review time on plate tectonics and terminology; if you have prior geology coursework, you may move faster.

What is the hardest part of C926?

For most students the challenge is the sheer amount of interconnected vocabulary and processes rather than any single hard concept. Plate tectonics and the rock cycle reappear throughout, so investing early in understanding them makes the rest much easier.

What should I focus on to pass?

Prioritize plate tectonics, Earth's internal structure, the rock cycle, geologic time, and surface processes. Study with active recall, draw the key cycles from memory, and use the pre-assessment to target your remaining weak spots before the real exam.

Do I need lab equipment or a home science kit for C926?

As a content course assessed by exam, C926 centers on understanding earth-science concepts rather than submitting lab reports. Check your Course of Study for any required activities, but plan your prep around mastering the material for a proctored assessment.

Keep Building Your Science Content Knowledge

C926 is one piece of the science-content foundation in the School of Education. If you are moving through the same program, these related guides can help you plan ahead: the closely related C925 Earth: Inside and Out, the physics content course C659 Conceptual Physics, and the life-science course C737 Evolution. You can also browse the full School of Education hub or the complete index of WGU study guides. For official course details, check the WGU institutional catalog.