- TExES 236 Domain Overview and Weighting
- Domain 1: Scientific Inquiry and Processes
- Domains 2 & 3: Physics and Chemistry
- Domains 4-7: Life Science Cluster
- Domains 8-9: Earth and Space Science
- Domain 10: Science Learning, Instruction and Assessment
- Question Format and On-Screen Tools
- Mapping a Study Schedule to Domain Weight
- Registration, Fees, and Eligibility
- Frequently Asked Questions
- Physics and Chemistry each carry 20% of the exam - together nearly half your score.
- The test has 140 selected-response questions in 4 hours 45 minutes of testing time.
- A scaled score of 240 is required to pass, out of 10 weighted content domains.
- Domain 10 (pedagogy) is only 5%, but Domains 2 and 3 combined outweigh every life-science domain.
TExES 236 Domain Overview and Weighting
TExES Science 7-12 (236) is organized into ten content domains, each assigned a percentage of the 140 selected-response questions on the exam. Unlike some certification tests where content areas are roughly equal, TExES 236 is heavily skewed toward two subjects: Physics and Chemistry. Understanding this weighting isn't optional trivia - it should directly shape how many hours you put into each subject area before test day.
Below is the full breakdown as defined by the Texas Education Agency's exam framework:
| Domain | Content Area | Approx. Weight |
|---|---|---|
| 1 | Scientific Inquiry and Processes | 10% |
| 2 | Physics | 20% |
| 3 | Chemistry | 20% |
| 4 | Cell Structure and Processes | 8% |
| 5 | Heredity and Evolution of Life | 8% |
| 6 | Diversity of Life | 8% |
| 7 | Interdependence of Life and Environmental Systems | 6% |
| 8 | Earth's History and the Structure and Function of Earth Systems | 9% |
| 9 | Components and Properties of the Solar System and the Universe | 6% |
| 10 | Science Learning, Instruction and Assessment | 5% |
If you want the full mechanics of how this exam is scored and structured before diving into content, our TExES 236 Study Guide 2026 walks through a first-attempt strategy that complements this domain breakdown.
Domain 1: Scientific Inquiry and Processes (10%)
Domain 1 tests your understanding of how science itself works - not facts about a specific subject, but the logic and mechanics of scientific investigation. Expect questions on experimental design, variable identification, data interpretation, lab safety protocols, and the appropriate use of measurement tools and units.
Domain 1: Scientific Inquiry and Processes
Candidates must understand the full investigative cycle, from hypothesis formation to peer review, and be able to critique flawed experimental setups presented in scenario-based items.
- Distinguishing independent, dependent, and controlled variables in multi-step scenarios
- Selecting appropriate lab safety and equipment procedures for secondary classrooms
- Interpreting graphs, tables, and data sets to draw valid conclusions
- Applying dimensional analysis and significant figures correctly
Because this domain often appears as scenario-based, multi-part items, it rewards careful reading more than memorization. Many candidates underestimate it because it feels "easy," then lose points to careless variable-identification errors.
Domains 2 & 3: Physics and Chemistry - The Exam's Center of Gravity
Domain 2 (Physics) and Domain 3 (Chemistry) are each weighted at 20%, making them the two largest domains on TExES 236 by a wide margin. If you're deciding where to concentrate your review time, these two domains should receive the largest blocks on your calendar.
Domain 2: Physics
Expect coverage of mechanics, energy, waves, electricity and magnetism, and thermodynamics - often framed as applied problems rather than pure formula recall.
- Newtonian mechanics: forces, motion, work, and energy conservation
- Wave behavior, including sound and light properties
- Circuits, electric fields, and magnetism fundamentals
- Heat transfer and thermodynamic principles
Domain 3: Chemistry
Chemistry questions span atomic structure through reaction chemistry, with an emphasis on conceptual understanding that supports secondary-level instruction.
- Periodic table trends, atomic structure, and bonding
- Stoichiometry and balancing chemical equations
- Solutions, acids/bases, and reaction rates
- Gas laws and states-of-matter transitions
The on-screen periodic table and physical-constants reference page provided during the test are genuinely useful here, but only if you already know how to apply the values - the reference won't teach you gas law relationships or bonding rules during the exam itself.
Key Takeaway
Treat Physics and Chemistry as your two "anchor domains." If your practice-test scores in these two areas aren't solid, no amount of extra review in smaller domains will compensate for the point loss.
Domains 4-7: The Life Science Cluster
Domains 4 through 7 collectively cover biological and ecological content, and while none is individually as heavy as Physics or Chemistry, together they represent roughly a third of the exam. Treating them as a connected cluster - rather than four isolated topics - helps you see the overlaps in terminology and concepts.
Domain 4: Cell Structure and Processes (8%)
Covers cell organelles, membrane transport, cellular respiration, photosynthesis, and mitosis/meiosis mechanics.
- Comparing prokaryotic vs. eukaryotic cell structures
- Energy pathways: glycolysis, Krebs cycle, electron transport
Domain 5: Heredity and Evolution of Life (8%)
Focuses on Mendelian genetics, DNA replication and protein synthesis, and mechanisms of evolution.
- Punnett squares and probability-based inheritance problems
- Natural selection, genetic drift, and speciation evidence
Domain 6: Diversity of Life (8%)
Tests classification systems, taxonomy, and comparative anatomy/physiology across kingdoms.
- Identifying defining characteristics of major taxonomic groups
- Understanding phylogenetic relationships and classification logic
Domain 7: Interdependence of Life and Environmental Systems (6%)
Covers ecosystems, energy flow, biogeochemical cycles, and human impact on environmental systems.
- Trophic levels, food webs, and energy transfer efficiency
- Carbon, nitrogen, and water cycle interactions
Because these four domains share vocabulary and conceptual threads (energy flow appears in both cellular and ecological contexts, for example), reviewing them in the same study block rather than spreading them across unrelated weeks tends to be more efficient.
Domains 8-9: Earth and Space Science
Domain 8 (9%) and Domain 9 (6%) round out the natural science content with Earth systems and astronomy. Combined, they're smaller than either Physics or Chemistry alone, but they're frequently under-reviewed simply because candidates run out of time before reaching them.
Domain 8: Earth's History and the Structure and Function of Earth Systems
Includes plate tectonics, rock cycle processes, weathering and erosion, geologic time, and weather/climate systems.
- Reading geologic cross-sections and relative-age dating principles
- Distinguishing weather patterns from long-term climate processes
Domain 9: Components and Properties of the Solar System and the Universe
Covers celestial mechanics, the life cycle of stars, and the structure of the solar system and broader universe.
- Kepler's laws and orbital mechanics basics
- Stellar classification and life-cycle stages
Don't leave these domains for the final days before your test appointment - a 15% combined weight (Domains 8 and 9) is larger than any single life-science domain and deserves dedicated review time.
Domain 10: Science Learning, Instruction and Assessment (5%)
Domain 10 is the smallest domain by weight, but it's also the one most different in character from the rest of the exam. Instead of testing scientific content knowledge, it evaluates your understanding of pedagogy: how to plan instruction, differentiate for diverse learners, integrate safety practices into lab-based lessons, and use formative and summative assessment appropriately.
Domain 10: Science Learning, Instruction and Assessment
Expect scenario-based items describing a classroom situation, followed by a question about the best instructional or assessment response.
- Designing inquiry-based lessons aligned to state science standards
- Selecting appropriate assessment types for measuring student understanding
- Applying safety and classroom-management best practices during labs
Because it's only 5% of the exam, Domain 10 shouldn't consume disproportionate study time - but a handful of missed items here can still matter if your score is borderline against the 240 scaled-score requirement.
Question Format and On-Screen Tools
TExES 236 consists of 140 selected-response questions, and some test forms may embed unscored field-test items within that total - you won't know which questions are field-tested, so every item should be treated as if it counts. The appointment window is 5 hours total, which includes a 15-minute tutorial and compliance agreement, leaving 4 hours 45 minutes of actual testing time.
Pearson administers the computer-based exam on behalf of the Texas Education Agency, and several tools are built into the testing interface:
- An on-screen scientific calculator for numerical problem-solving
- A periodic table for chemistry-related items
- A definitions and physical-constants reference page
These tools reduce the need to memorize constants, but they don't replace conceptual fluency - you still need to know which formula or constant applies to a given scenario. For a deeper look at how the scoring threshold works alongside this format, see our breakdown of the TExES 236 Passing Score requirements.
Mapping a Study Schedule to Domain Weight
Rather than studying domains in numerical order, it makes more sense to allocate time proportional to weight - with extra buffer time for domains you personally find weakest. A schedule built around the actual point distribution might look like this:
Physics & Chemistry Foundations
- Review mechanics, energy, and periodic trends
- Practice stoichiometry and force/motion problem sets
Scientific Inquiry and Processes
- Practice variable identification and data-interpretation scenarios
- Review lab safety protocols
Life Science Cluster
- Work through cell processes, genetics, diversity, and ecology together
- Connect energy-flow concepts across cellular and ecosystem levels
Earth and Space Science
- Review plate tectonics, rock cycle, and weather/climate distinctions
- Study orbital mechanics and stellar life cycles
Pedagogy and Full-Length Practice
- Review instructional and assessment scenarios in Domain 10
- Take full-length timed practice tests under 4-hour-45-minute conditions
This kind of structure - weighting your calendar to match domain weighting rather than splitting time evenly - is covered in more depth in our TExES 236 Study Guide. If you're still deciding whether the exam matches your current knowledge level, our TExES 236 difficulty guide breaks down where most candidates struggle by domain.
Registration, Fees, and Eligibility
Before you can schedule a testing appointment, most candidates need approval through an eligible certification route, typically coordinated through an educator preparation program; candidates pursuing the PACT pathway follow a separate pre-admission process. The exam fee is $116, paid directly through the Pearson registration system once you're approved to test.
For a complete walkthrough of eligibility pathways, testing windows, and what happens after you pass, see our guides on TExES 236 Requirements and TExES 236 Exam Dates 2026. If cost planning matters to your decision, the TExES 236 Certification Cost breakdown covers fees beyond the base test price.
Once you understand the domain structure above, it's worth running a full diagnostic practice session on our practice test platform to see which domains need the most attention before you commit to a testing date. Many candidates find that a single diagnostic run through a full-length practice exam reveals gaps that content review alone wouldn't surface.
Frequently Asked Questions
Start with Physics and Chemistry, since each carries 20% of the exam - the two largest domains combined outweigh the entire life-science cluster (Domains 4-7).
The exam includes 140 selected-response questions, administered within 4 hours 45 minutes of testing time inside a 5-hour appointment that also includes a tutorial.
No - an on-screen periodic table, scientific calculator, and a definitions and physical-constants reference page are provided during the test, though you still need to know how to apply them.
Domain 10 is only 5% of the exam, so it shouldn't dominate your schedule, but scenario-based instructional questions can still be worth a review pass, especially near a borderline score.
A scaled score of 240 is required to pass. See our dedicated TExES 236 Passing Score guide for how scaled scoring works across the ten domains.