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OSATCode: 108

OSAT Earth Science (108) Practice Tests

Prepare for the OSAT Earth Science (108): 80 selected-response questions and 1 constructed-response assignment in 4 hours, covering 6 content areas: Science Practices and the Engineering Process (16%), Space Systems (18%), Geological Systems (18%), Atmospheric and Hydrological Systems (18%) and 2 more.

81
Questions
4h
Time limit
240
Pass score
6
Domains
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Explanation for every question
Domain-level score breakdown
Timed full-length practice mode

Source: All exam details are drawn from official examination program websites and state educator certification agency documentation. Most state licensure exams are developed and administered by Evaluation Systems of Pearson (nesinc.com) on behalf of state departments of education. Always verify current requirements with your state's teacher certification agency.

OSAT Earth Science (108): Test at a Glance

Key facts directly from the official Oklahoma State Department of Education / NES test specifications.

Test Code
108
OSAT
Total Questions
81
Selected-response
Time Limit
4h
Computer-delivered
Passing Score
240
Scaled; varies by state
Registration Fee
Varies
Paid to Oklahoma State Department of Education / NES at registration
Content Areas
6
Official blueprint
Score Reporting
Varies
After test date
Delivery
Computer
Prometric or remote

Official Exam Blueprint

The official Oklahoma State Department of Education / NES blueprint defines exactly 6 content categories. Percentages are drawn directly from official exam specifications.

Category 1
Science Practices and the Engineering Process
16%
13 questions
Category 2
Space Systems
18%
15 questions
Category 3
Geological Systems
18%
15 questions
Category 4
Atmospheric and Hydrological Systems
18%
15 questions
Category 5
Natural Hazards and Human Environmental Interaction
15%
12 questions
Category 6
Pedagogical Content Knowledge
15%
12 questions

Registration & Test Day

Everything you need to know before and on test day.

Registration

Register withOklahoma State Department of Education / NES
Registration feeVaries
ID requiredGovernment-issued photo ID
Score recipientsDesignate at registration

Scoring

Score typeScaled score
Raw score basisCorrect answers only
Passing scoreVaries by state
Results availableVaries by exam

In-Person Testing

Test centersVaries by exam program
Personal itemsStored in locker
Scratch paperProvided at station
Admission ticketPrint from testing account

Remote Testing

DeviceLaptop/desktop only
No touchscreensTablets not allowed
Browser requiredSecure test browser (if applicable)
Equipment neededCamera, mic, speakers

Passing Score Requirements by State

Passing scores are not uniform across states.

Important: Passing score requirements for the OSAT Earth Science (108) are set individually by each state or licensing agency. A score that meets requirements in one state may not meet requirements in another. Always verify the exact passing score for your state with Oklahoma State Department of Education / NESor your state's teacher certification agency before registering.

Frequently Asked Questions

Answers sourced from official examination program documentation and test preparation resources.

How many questions are on the OSAT Earth Science (108) exam?+
The OSAT Earth Science (108) consists of 81 selected-response questions with a standard time limit. Questions assess both foundational knowledge and the ability to apply concepts to practical situations.
What is the passing score for the OSAT Earth Science (108)?+
Passing scores vary by state and institution. Always verify the specific requirement for your state with Oklahoma State Department of Education / NES or your state's teacher certification agency before registering.
How much does the OSAT Earth Science (108) exam cost?+
Registration fees vary by exam and are paid directly to Oklahoma State Department of Education / NES at the time of registration. Some states or institutions may charge additional fees.
When will I receive my OSAT Earth Science (108) score?+
Official score reports are typically available several weeks after your test date. Scores are posted to your testing account and sent to any institutions you designated at registration.
Can I take the OSAT Earth Science (108) exam at home?+
Remote testing availability varies by exam program. Check with Oklahoma State Department of Education / NES for current options, which may include a secure browser, webcam, microphone, and live proctor monitoring.
Is there a penalty for wrong answers on the OSAT Earth Science (108)?+
Scoring policies vary by exam program — verify with Oklahoma State Department of Education / NES whether incorrect answers are penalized before test day.

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Sources: Official OSAT examination program documentation and state educator certification agency resources, administered by Oklahoma State Department of Education / NES. This site is not affiliated with or endorsed by Oklahoma State Department of Education / NES. Passing score requirements vary by state — always verify current requirements with your state's teacher certification agency.
Last Updated: October 30, 2026