WGU C650: Geology I: Physical

What Geology I: Physical is really about

C650 Geology I: Physical is a science-content course in WGU's Secondary Earth Science Education programs, housed in the School of Education. You will typically take it if you are working toward a bachelor's or master's that leads to licensure or endorsement to teach earth or physical science at the secondary level. According to WGU's program materials, it surveys minerals and rocks, Earth's major physical features, and the internal and surface processes that shape them. It carries three competency units and has no prerequisites, so many students meet it early in their science-content sequence.

Direct answer: C650 is assessed by a performance assessment, not a proctored multiple-choice test, so you "pass" by submitting written work that demonstrates each competency and meets the rubric. Learn the geology deeply enough to explain and analyze it in your own words, then write clearly, address every prompt and rubric point, and use the revise-and-resubmit cycle rather than rushing a single draft.

Because this is a course for future teachers, it asks for more than recognition. You are expected to reason about why a landform looks the way it does, how a rock formed, or what the movement of tectonic plates implies about the geology of a region. That framing matters: the goal is not to memorize a list of terms for a test, but to understand Earth processes well enough that you could one day explain them to a classroom. Keeping that purpose in mind tends to make the material stick.

The topics the assessment asks you to demonstrate

WGU's competency descriptions for C650 point to a consistent set of subject areas. Expect to work with the following:

• Minerals and rocks — identifying and classifying them, and understanding how igneous, sedimentary, and metamorphic rocks form.
• Plate tectonics — the composition, location, movement, and physical evidence of tectonic plates, and how they produce landforms and geologic features.
• Earth's internal processes — the magnetic field, convection currents in the mantle, and how internal activity drives plate tectonics.
• Surface processes — weathering, erosion, and the deposition of sediments by gravity, wind, water, and ice, and the features these processes create.
• Maps — reading topographic and geologic maps to deduce landforms and geologic features.
• History of the Earth sciences — key concepts and the scientists who developed them, in cultural context.
• The solar system and Earth's origins — the composition, properties, location, and origin of solar-system objects and what they reveal about Earth's evolution.

If a science-content course like this feels adjacent to your other requirements, it is worth glancing at other lab-science content courses WGU science-teaching students often take, such as C672 General Chemistry I with Lab and C673 General Chemistry II with Lab.

How hard is it, and how much time should you plan?

Difficulty in C650 is uneven and depends heavily on your background. Many students report that the concepts are approachable and even enjoyable, especially compared with heavy math or chemistry courses, and that the volume of terminology is the main obstacle. Others report that the breadth surprised them, because the course reaches from minerals all the way out to the solar system. Treat it as a moderate course rather than a trivial one.

Prep time varies widely. Students with a science teaching background or prior geology exposure often move quickly, while those new to the material tend to describe several weeks of steady study before they feel ready to write. A realistic plan is to spread the learning over two to four weeks of consistent daily reading and note-taking, then reserve dedicated time for drafting and revising your task. Because this is a performance assessment, the writing and revision stage is part of the workload, not an afterthought, so budget for it.

A study and writing plan built for a content PA

A performance assessment rewards a different rhythm than a timed test. Combine genuine learning of the geology with disciplined writing:

• Learn actively, not passively. After reading a chapter on, say, the rock cycle, close the book and write out the cycle from memory in your own words. This active-recall step reveals what you truly understand versus what only felt familiar on the page.
• Space your review. Mineral and rock identification is classic spaced-repetition material. Revisit your identification notes every couple of days rather than cramming; the classifications stick far better when you meet them repeatedly over time.
• Practice explaining. Because the assessment asks you to demonstrate reasoning, rehearse by explaining a concept aloud or in a short paragraph as if teaching it. If you can explain how convection in the mantle links to plate movement, you can write it.
• Work with the rubric like a checklist. Before you draft, break each task prompt into its rubric components and answer them one at a time. Evaluators score against specific competencies, so a response that is well written but skips a required element will come back for revision.
• Use maps and diagrams as study tools. Sketch tectonic boundaries, label a geologic cross-section, or annotate a topographic map. Drawing forces the spatial understanding that reading alone rarely delivers.
• Draft, then revise deliberately. Submit your best complete draft, read evaluator feedback carefully, and treat any returned task as targeted instructions for exactly what to strengthen.

Because C650 is preparing you to teach, the assessment-literacy habits from courses like D184 Standards-Based Assessment transfer well here: know precisely what a rubric is measuring before you produce work against it.

Where students trip up in C650

• Studying for the wrong format. Some students prepare as if for a multiple-choice test and then struggle to produce sustained written explanations. Practice writing throughout, not just reading.
• Confusing rock and mineral categories. The three rock types and their formation processes blur together under pressure. Anchor each to how it forms rather than memorizing traits in isolation.
• Answering around the prompt. Writing a lot of true geology that does not directly satisfy a rubric point is a common reason tasks are returned. Map your paragraphs to the requirements.
• Underestimating breadth. The jump from surface processes to solar-system origins catches people who assumed the course stopped at rocks. Cover the full topic list.
• Rushing revision. Treating returned feedback as a nuisance rather than a roadmap leads to repeated resubmissions. Address every noted item the first time you revise.

C650 Readiness Checklist

Before you submit, work through these self-checks:

• Can you identify and classify common minerals and the three rock types by how they form?
• Can you explain the evidence for plate tectonics and the types of plate boundaries?
• Can you connect mantle convection and Earth's internal processes to plate movement?
• Can you describe how weathering, erosion, and deposition by gravity, wind, water, and ice shape landforms?
• Can you read a topographic or geologic map and deduce the features it shows?
• Can you place a few key concepts in the history of the Earth sciences and name who advanced them?
• Can you relate solar-system objects to Earth's origin and evolution?
• Have you matched every paragraph of your draft to a specific rubric requirement?
• Have you reread evaluator feedback and addressed each point before resubmitting?

C650 FAQ

Is C650 an objective assessment or a performance assessment?

WGU's program materials indicate C650 is assessed through a performance assessment task for both undergraduate and graduate versions. That means you submit written work evaluated against a rubric rather than sitting a proctored multiple-choice exam. Always confirm the current format in your own Course of Study, since WGU updates courses over time.

How many competency units is C650 worth?

The course is listed at three competency units in WGU's program guidebooks. Competency units are WGU's measure of course weight, roughly analogous to credit hours at a traditional school.

Do I need prior geology experience to pass?

No. The course has no prerequisites and starts with foundational material. Students without a geology background can succeed with steady study; expect to spend more time on terminology and rock and mineral classification if the subject is new to you.

How long does it usually take to complete?

It varies with your background and pace. Many students report finishing within a few weeks of consistent effort, with additional time set aside for drafting and revising the assessment. Because it is a performance assessment, plan for the writing stage, not just the reading.

What resources actually help?

Lean first on the official course materials and learning resources provided inside your WGU course, and stay in contact with your course instructor, who can point you to what the assessment expects. A solid open physical-geology textbook and plenty of self-made diagrams and identification notes round out your preparation.

Can I revise and resubmit if my task does not pass the first time?

Performance assessments at WGU are built around feedback. If your submission does not yet meet every competency, evaluators return specific comments, and you revise and resubmit. Treat that feedback as a precise guide to what still needs work.

Keep going

For more on how these science-content courses fit your degree plan, see the official WGU Secondary Earth Science Education program page. You can also browse the School of Education guide hub or the full index of WGU course guides to plan the rest of your term.