Free GED Science Practice Test

About the GED Science Test

The GED Science test evaluates your understanding of scientific concepts and, more importantly, your ability to interpret data, draw conclusions, and apply scientific reasoning. Unlike many science tests you may have taken in school, the GED Science test emphasizes scientific reasoning skills over factual recall. You'll spend more time analyzing graphs, charts, and experimental descriptions than recalling memorized facts.

The test consists of approximately 34-40 questions answered in 90 minutes, including two short-answer response questions. An on-screen TI-30XS calculator is available for certain questions, and a formula reference sheet is provided.

Content Areas and Breakdown

Life Science (40%)

The largest section covers biological concepts that are essential to understanding living systems:

• Cell biology — Cell structure, cell division (mitosis/meiosis), and cellular processes like photosynthesis and respiration
• Genetics and heredity — DNA, genes, Punnett squares, dominant/recessive traits, and mutations
• Evolution and natural selection — Adaptation, speciation, fossil evidence, and common ancestry
• Human body systems — Circulatory, respiratory, digestive, nervous, and immune systems
• Ecology — Food chains, ecosystems, energy flow, and population dynamics

Physical Science (40%)

Covering both chemistry and physics fundamentals:

• Chemical reactions — Balancing equations, reaction types, conservation of mass
• Properties of matter — States of matter, phase changes, atomic structure, periodic table trends
• Motion and forces — Newton's laws, speed/velocity/acceleration, gravity, friction
• Energy — Kinetic vs. potential energy, conservation of energy, heat transfer
• Waves — Sound waves, light waves, electromagnetic spectrum

Earth and Space Science (20%)

• Earth's structure — Plate tectonics, earthquakes, volcanoes, rock cycle
• Weather and climate — Atmosphere, water cycle, climate change, greenhouse effect
• The solar system — Planets, orbits, seasons, lunar phases, stars and galaxies

Key Skills Tested

The GED Science test focuses heavily on these reasoning skills:

• Data interpretation — Reading and analyzing graphs, tables, charts, and diagrams. This is the most tested skill. Master these skills with our in-depth guide on GED Science data interpretation.
• Scientific method — Understanding hypothesis, experiment design, variables (independent, dependent, control), and drawing conclusions from results
• Evidence-based reasoning — Using data to support or refute a claim
• Applying concepts — Using scientific knowledge to explain real-world phenomena

The Short Answer Response Questions

Unlike the multiple-choice portions of the other GED subjects, the Science test includes two Short Answer Response (SAR) items worth up to 3 points each. For each SAR question you will be given one or two stimulus materials — a passage, diagram, or data set — and asked to write a brief response (typically 3–7 sentences). Your response is scored on three traits:

• Science practices — Did you apply correct scientific reasoning and use evidence from the stimulus?
• Science content — Did you demonstrate accurate understanding of the relevant concept?
• English language conventions — Is your response grammatically clear and understandable?

To score well on SAR questions, always cite specific data from the provided material. Avoid vague statements like "the data shows an increase" — instead write "the graph shows that CO₂ levels rose from 315 ppm in 1960 to 420 ppm in 2023." Precision earns points.

Scientific Reasoning: The Core Skill

The most important skill for the GED Science test is not content knowledge — it is the ability to reason scientifically. Every question, whether multiple choice or short answer, tests one or more of these scientific practices:

• Analyzing and interpreting data — Identifying trends, outliers, and relationships in graphs, tables, and charts. This accounts for the largest share of test questions.
• Designing investigations — Understanding experimental design: what constitutes a valid hypothesis, how to control variables, what makes an experiment replicable.
• Reasoning from evidence — Using data to support, refute, or modify a claim. The test frequently asks whether the data supports or contradicts a given conclusion.
• Working with models — Interpreting diagrams, flowcharts, and scientific models to understand processes (e.g., the carbon cycle, a food web, atomic models).
• Evaluating conclusions — Identifying which conclusion is best supported by evidence, or recognizing logical flaws in a given argument.

Study Tips for GED Science

• Practice reading data — Spend time interpreting graphs, charts, and tables from newspapers, science websites, or textbooks. This skill is tested more than any specific factual knowledge. See our GED Science data interpretation guide for strategies and examples.
• Learn the scientific method cold — Understand hypothesis → experiment → data → conclusion. Know the difference between independent variables (what you change), dependent variables (what you measure), and control variables (what you keep constant).
• Don't memorize the periodic table — Focus on understanding trends (metals vs. non-metals, groups vs. periods, reactivity) rather than memorizing individual elements.
• Read science articles — Practice reading and understanding scientific passages from sources like Scientific American or science news websites. The passages on the test are often written at a similar level.
• Focus on "why" not "what" — The test cares more about understanding processes (why does natural selection produce adaptation?) than isolated facts (what year was Darwin born?).
• Practice SAR responses — Write timed short-answer responses to sample prompts. Aim to cite specific data from any provided stimulus material. Aim for 3-5 sentences with clear evidence-based reasoning.
• Practice with the TI-30XS calculator — Familiarize yourself with this specific calculator model. Practice entering scientific notation, using the fraction key, and computing square roots.
• Use all four GED practice tests together — Science shares reasoning skills with Social Studies and Math. For a complete multi-subject study plan, see our GED practice test study guide.

How This Practice Test Compares to the Real Exam

This 20-question practice test covers the same three content areas as the official GED Science test and uses similar question styles. However, there are important differences to be aware of:

• The real test has 34–40 questions over 90 minutes; this practice test has 20 questions (~25 minutes)
• The real test includes two Short Answer Response (SAR) questions requiring written responses; this practice test does not
• Some real test questions involve interpreting complex multi-panel diagrams or extended data sets; question complexity here is slightly lower
• The real test is administered on GED Testing Service's secure platform; this test runs in your browser

Use this test to identify your weakest content areas and gauge your overall readiness. Once you achieve consistent scores above 70%, focus your remaining study time on timed SAR practice and full-length simulated exams.

FAQ

How many questions are on the real GED science test?

The actual GED Science test has about 34-40 questions and takes 90 minutes. Many questions involve reading passages, data tables, or graphs. There are also two short-answer response questions where you write a brief explanation.

Do I need to memorize formulas?

No, a formula reference sheet is provided during the actual test. Focus on understanding concepts and knowing when to apply each formula rather than memorizing them. However, being familiar with the formulas will help you work faster.

What is the passing score for GED Science?

You need a score of 145 out of 200 to pass. A score of 165 or higher indicates college readiness, and a score of 175 or higher may earn college credit at participating institutions.

Can I use a calculator on the GED Science test?

Yes, an on-screen TI-30XS MultiView calculator is provided for certain questions that involve calculations. Practice using this specific calculator model before test day, as it has some unique functions you'll want to be comfortable with.