GED Science Test Prep Guide: How to Study, Practice, and Pass on Your First Try
Oct 30, 2025With approximately 40 questions, the GED Science test assesses knowledge in biology, chemistry, physics, and environmental science.
Test takers have 90 minutes to demonstrate their understanding of diverse scientific principles. Achieving a passing score of 145 is crucial for obtaining the GED credential, signifying proficiency across a spectrum of scientific disciplines.
In this article, you will learn how to prepare and pass the GED Science test and get practice questions to help you with your study prep.
What Is the GED Science Test?
The GED Science test is one of the four subject tests included in the General Educational Development (GED) test battery.
The GED is a series of high school equivalency exams designed for individuals who did not complete their traditional high school education but wish to earn a credential equivalent to a high school diploma.
The GED Science test assesses your knowledge and skills in various scientific areas, including:
- Life Science
- Physical Science
- Earth and Space Science
It is designed to measure your ability to understand and interpret scientific information, apply scientific principles, and analyze scientific data.
GED Science prep involves studying scientific concepts, developing critical thinking skills, and practicing with sample questions.
Many resources, including GED Science study guides and practice tests, are available to help individuals prepare for their test and successfully earn their GED credential.
When Does a GED Science Test Get Taken?
The GED Science test is designed for those who were unable to complete their traditional high school education but want to earn an equivalent credential, either to apply for college or university or to open up more job opportunities.
The GED Science test is often also taken with the other subject tests, including:
- Reasoning Through Language Arts
- Mathematical Reasoning
- Social Studies
However, eligibility requirements for taking the GED test may vary by location, so it's important to check with the testing center or the official GED website for specific information.
GED Science Study Guide – Example Questions
Below is a selection of practice GED science questions.
While these are not the exact questions from the test, they are representative of the types of questions you might encounter.
Please keep in mind that the actual GED Science test questions may vary, and these examples are for practice only:
1. Which organelle is responsible for the production of energy in a eukaryotic cell?
a) Nucleus
b) Mitochondrion
c) Ribosome
d) Endoplasmic reticulum
The correct answer is: b)
The mitochondrion is known as the powerhouse of the cell because it produces energy in the form of adenosine triphosphate (ATP) through a process called cellular respiration. This process converts nutrients such as glucose into usable energy that powers the cell’s activities.
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The nucleus controls the cell’s genetic material and regulates cell functions.
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Ribosomes make proteins.
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The endoplasmic reticulum helps in the synthesis and transport of proteins and lipids.
2. What is the chemical symbol for the element with atomic number 79?
a) Au
b) Ag
c) Cu
d) Fe
The correct answer is: a)
The element with atomic number 79 is gold, and its chemical symbol is Au. The symbol comes from the Latin word “Aurum,” meaning 'shining dawn or glow of sunrise'.
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Ag stands for silver (atomic number 47).
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Cu stands for copper (atomic number 29).
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Fe stands for iron (atomic number 26).
3. An object is in motion if it:
a) Has a large mass
b) Is at rest
c) Changes position over time
d) Is in a vacuum
The correct answer is: c)
An object is said to be in motion when it changes its position over time relative to a reference point. Motion can be in any direction and at any speed.
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Having a large mass (a) doesn’t determine whether an object is moving.
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If an object is at rest (b), it’s not moving.
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Being in a vacuum (d) simply means there’s no air, but an object can still be either moving or stationary there.
4. What causes the seasons on Earth?
a) Changes in Earth's distance from the sun
b) Tilt of Earth's axis
c) Rotation of Earth on its axis
d) Earth's elliptical orbit
The correct answer is: b)
The tilt of Earth’s axis (about 23.5 degrees) is what causes the seasons. As Earth orbits the Sun, different parts of the planet receive varying amounts of sunlight at different times of the year.
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When the Northern Hemisphere is tilted toward the Sun, it experiences summer, while the Southern Hemisphere experiences winter, and vice versa.
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The distance from the Sun (a) changes only slightly and does not cause the seasons.
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The rotation of Earth (c) causes day and night, not seasons.
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The elliptical orbit (d) affects the length of the year but not seasonal temperature changes.
5. Which of the following is a renewable source of energy?
a) Coal
b) Natural gas
c) Solar power
d) Nuclear power
The correct answer is: c)
Solar power is a renewable energy source because it comes from the Sun, which continuously produces energy and will not run out for billions of years. It can be harnessed using solar panels to generate electricity or heat.
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Coal (a) and natural gas (b) are fossil fuels, which take millions of years to form and are therefore non-renewable.
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Nuclear power (d) uses uranium, a finite resource, so it’s also considered non-renewable, even though it produces low carbon emissions.
These examples cover a range of scientific topics that are typically included in the GED Science test.
When working through GED science practice and preparation, it's essential to:
- Review scientific concepts
- Practice with sample questions
- Develop critical thinking skills to analyze and interpret scientific information
Additionally, an official GED science study guide can provide a more accurate representation of the question format and difficulty level.
General Conditions of the GED Science Test
To apply for the GED Science test, there are certain criteria and conditions that need to be met.
Age and Educational Status
All candidates must be at least 16 years old and not a high school graduate to be eligible to take the GED test.
Identification
Candidates are required to present a valid form of identification before taking the GED test. This ID must include the candidate's name, signature, and a recognizable photograph.
Preparation
Before taking the GED Science test, individuals often spend time preparing for the exam.
This may involve self-study by working through GED Science practice questions, GED preparation classes, or online resources to review the necessary subject matter.
Number of Attempts
Candidates are allowed to take each subject test a total of three times.
If a candidate needs to sit the test a fourth time, they must wait at least 60 days and be in a new academic year before retaking it.
As such, working through a GED Science practice test is essential.
Computer-Based Testing
GED Science questions are administered through a computer-based testing (CBT) system.
Candidates should be familiar with basic computer skills to navigate through the test interface.
Subject Requirements
The GED test consists of four subjects: Reasoning Through Language Arts (RLA), Mathematical Reasoning, Science, and Social Studies.
Candidates need to complete all four subjects to earn the GED credential.
It's important for candidates to check specific eligibility requirements and testing policies with the official GED testing center or the official GED website, as these requirements can vary by location and may be subject to updates.
Additionally, candidates may benefit from GED Science lessons, preparation programs, or study materials to enhance their readiness for the test.
How to Prepare for the GED Test
Preparing for the GED Science test requires a combination of studying, practice, and familiarization with the test format.
Here are some steps and tips to help you prepare effectively:
Understand the Test Format
Familiarize yourself with the format of the test and the questions by reviewing a free GED Science practice test.
Assess Your Weaknesses
Identify your strengths and weaknesses in each subject. This will guide your study plan and help you focus on areas that need improvement.
Dedicate more time and resources to those areas that you struggle with.
Use Official GED Materials
Use official GED study materials, which may include study guides and practice GED Science questions and answers.
These materials are designed to align with the content and format of the actual test.
Take Practice Tests
The best way to prepare is by completing a number of science GED practice tests and reviewing your GED science practice test answers.
This helps you become familiar with the testing environment, identify areas for improvement, and manage your time effectively.
Create a Study Schedule
Develop a study schedule that allocates time for each subject. Consistent, focused study sessions are more effective than cramming.
Use Online and Additional Resources
Explore online resources, including official GED websites, which may offer additional practice tests, study tips, and interactive materials.
Consider using additional study materials, such as textbooks, online courses, or flashcards, to reinforce your understanding of key concepts.
Join a GED Preparation Program
Many communities offer GED preparation programs.
These programs may be available through local adult education centers, community colleges, or online platforms.
Practice Time Management
Practice managing your time during a science GED practice test to ensure you can complete each section within the allotted time.
Review Incorrect Answers
After taking practice tests, review the GED Science test answers to see where you went wrong.
Understanding the correct answers and the reasoning behind them will help improve your knowledge and performance on the test.
Stay Motivated
Stay motivated and maintain a positive mindset throughout your preparation. Celebrate small victories, and remember that consistent effort pays off.
Remember that success on the GED test requires dedication and persistence.
Tailor your study plan to your individual needs and learning style, and don't hesitate to seek help from teachers, tutors, or support programs if needed.
Online Registration
The process for online registration for the GED test can vary by location.
However, it is typically managed by the official GED Testing Service or a designated testing center.
Here's a general guide on how you might proceed with online registration:
- Visit the official GED website and create an account – You will need to provide personal information, including your name, address, date of birth, and other relevant details. This account will allow you to schedule and manage your tests.
- Verify eligibility – Ensure you meet the eligibility criteria for taking the GED test, such as age requirements and educational status.
- Select test subjects – Choose the specific subjects you want to take. The GED test consists of four subjects: Reasoning Through Language Arts, Mathematical Reasoning, Science, and Social Studies.
- Schedule the test dates – Once you've created an account and selected your test subjects, you should be able to choose and schedule test dates. Check for available dates at authorized testing centers.
- Pay the fees – Be prepared to pay the required fees for the GED test. Fee structures may vary, so review the costs associated with the test.
- Confirmation and preparation – After completing the registration process, you should receive confirmation of your test dates and details. Take note of this information, and use the time leading up to your test date for further preparation.
Taking the Test
Here's a breakdown of each of the GED tests and ways to sit them.
- Reasoning Through Language Arts (RLA) – 150 minutes
- Mathematical Reasoning – The exact time for the Mathematical Reasoning section may vary, but it typically takes around 115 minutes.
- Science – The Science section typically takes about 90 minutes.
- Social Studies – Approximately 70 minutes
Candidates have the flexibility to choose the number of subjects they want to take in a day.
Some may choose to spread the test sessions across multiple days, while others may opt to complete all four subjects in a single day. If you were to sit all tests in a single setting, it would take approximately eight hours.
Before deciding, realistically consider how many hours you can stay focused before your performance starts to dip.
What Is the Passing Score?
The passing score for each individual subject on the GED test is 145.
The scoring range for each subject is 100 to 200. Therefore, a score of 145 or higher indicates that a test taker has demonstrated the knowledge and skills necessary to pass that specific subject.
Candidates who achieve a score of 170 in each subject will get an honour designation.
It's important to note that the overall passing score for the GED test is not an average of the scores in each subject.
Instead, a test taker must achieve a passing score of 145 or above on each individual subject to earn the GED credential.
Test scores are typically delivered within three to 24 hours.
Frequently Asked Questions
What type of science is on the GED test?
The GED Science test covers a variety of scientific topics, including biology, chemistry, physics, astronomy, and environmental science. Test takers need to demonstrate their understanding of scientific concepts, principles, and their application across different scientific disciplines.
Is the GED Science test hard?
The difficulty of the GED Science test varies for individuals. It covers diverse scientific topics, requiring a solid grasp of concepts.
Proper preparation and understanding scientific principles can make it manageable, but personal readiness and study habits play a significant role in perceived difficulty.
What is the hardest GED test?
The perceived difficulty of GED tests varies, but many find the Mathematical Reasoning section challenging. It assesses algebraic and quantitative skills, demanding problem-solving abilities.
Adequate preparation and practice can help individuals navigate and succeed in this potentially challenging subject.
How many GED Science test answers can you get wrong?
The test doesn't have a fixed number of questions one can answer incorrectly.
Scoring is on a scale of 100 to 200, with 145 as the passing score. The number of correct answers required for passing varies, and it's essential to aim for a score of 145 or higher.
How long is the science GED test?
The GED Science test typically takes about 90 minutes to complete. Test takers must efficiently manage this time to answer questions across various scientific topics, demonstrating their understanding of biology, chemistry, physics, astronomy, and environmental science within the allotted time frame.
How many questions are on the science GED test?
The number of questions on the GED Science test can vary, but it typically consists of around 40 questions.
Test takers need to answer these questions within the allocated time, covering diverse scientific subjects to demonstrate their knowledge and understanding across various disciplines.
What is the passing score for the GED Science test?
The passing score for the GED Science test is 145. Test-takers must achieve this score or higher to demonstrate proficiency in the subject and earn the GED credential. The scoring scale ranges from 100 to 200.
Final Thoughts
Success on the GED Science test requires a comprehensive understanding of biology, chemistry, physics, and environmental science.
Achieving a passing score of 145 reflects proficiency across these disciplines, marking a significant step toward earning the GED credential and opening doors to further educational and career opportunities.
To earn your best possible score, take the time to prepare using study guides and materials, and complete practice test questions.
