GED Science Study Guide – GED Science Free Online Classes

This GED Science Study Guide explains how to prepare for the GED Science Test. We publish 12 free Science lessons to help you get started with your GED prep.

Every lesson comes with video instruction, text, and a short practice test.

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These lessons are created by Onsego, certified “Fully GED Test-Aligned” by GED Testing Service.

Our free lessons help you understand key Science concepts and discover if online learning works for you.

GED Science Study Guide – Science Lessons

These 12 free lessons are part of the Onsego Science course, which includes 87 lessons with quizzes, 15 practice tests, flashcards, and cheat sheets. You can get it here.

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The GED Science test covers Life Science, Physical Science, and Earth and Space Science. Our free lessons cover essential topics you need to pass.

Then, you can take our free GED science practice test to discover which academic areas require the most attention.

GED Science Study Guide – What to Study?

The topics addressed in the GED Science test are Life Science (Biology), Physical Science (Physics and Chemistry), Earth and Space Science, and Scientific Practices. Questions related to Scientific Practices can be addressed in any subject area in the GED Science syllabus.

You best start learning the lessons from the chapters “Life Science” and “Physical Science” because 80% of all questions on the GED Science test are related to these topics. Now, let’s see what’s on the GED Science test. The GED Science curriculum includes the following.

Life Science

Life Science (Biology) makes up 40% of the test and includes questions related to

  • Cell Structures
  • Cell Processes
  • Health and Nutrition
  • The Human Body
  • Organ Systems
  • Heredity
  • Genetics
  • Evolution
  • Ecosystems

Physical Science

Physical Science covers 40% of the GED Science test, and topics include

  • Atoms and Molecules
  • Properties and States of Matter
  • Chemical Reactions
  • Energy and Work
  • Motion and Forces
  • Waves and Sound
  • Electricity and Magnetism

Earth and Space Science

Earth & Space Science covers 20% of the GED Science test, and topics include

  • Earth’s Structure
  • Geological Cycles and Processes
  • Renewable and Nonrenewable Natural Resources
  • Weather and Climate
  • The Solar System
  • The Universe

GED Science Study Guide – Charts and Graphs

On the GED Science test, there are questions that use visual information such as graphs, diagrams, charts, tables, or maps.

To understand the information presented in visual materials, you should practice a lot with this sort of question. Most students will be more familiar with questions that include textual passages, and understanding visually represented information may be challenging.

You could see diagrams of an atom’s internal structure or a diagram presenting the Milky Way Galaxy. On the GED Science test, these tools are often used to represent specific scientific processes. These questions will assess your knowledge of these processes.

Is the GED Science Test Hard?

Many test-takers find the GED Science test pretty hard. The test measures to what extent you are able to understand, analyze, interpret, and apply the provided GED Scientific Information. Our GED Science Study Guide helps you determine how to study effectively.

Because there are quite a few questions that include visual elements, understanding how to read this information properly is key. So, becoming well-prepared and familiar with this sort of representation is needed for success. This makes the GED Science test pretty hard, but it is what is on the Science GED test.

How Long is the GED Science Test?

Many students ask us, “How long is the Science GED test?” Well, on the GED Science Test, you are given 90 minutes to complete 34 questions. You’ll see questions that include reading passages, but there are also, as said before, questions that include graphics such as tables, diagrams, maps, or graphs.

The GED tests are timed tests. Taking multiple practice tests will not only allow you to discover your weak points, but it also lets you get accustomed to the testing format, and if you take timed practice tests, you’ll learn what it is to take tests under time pressure, but making GED Science study notes will help you ace the GED Science test.

How Many Questions Can You Miss on the GED Science Test?

As said earlier, there are 34 questions on the GED Science subtest. To reach a passing score (145), you will have to answer at least between 22 and 24 answers correctly.

Can I Pass the GED Science Test without Studying?

Yes, you can because 85 to 90 percent of science questions can be answered using only the information and data that are provided in the passages, charts, and graphs that appear on the science test.

Only 10 or 15 percent of the questions use what we call outside information. However, it’s important that you have well-developed reading comprehension skills and you are familiar with the scientific vocabulary. Knowing a few active reading strategies will help you, too and we provide GED online classes for free to help you get started.

So, now you know all about our GED Science Study Guide.

Last Updated on February 2, 2026.