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GED Science

Past exam questions and practice questions based on official past exams

Checked 10/26/26

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Full mock exam40 questions · 90 min · 4 choices →Key conceptsAI-written · VerifiedRead the key concepts by subject and unit before you practice.3 subjects · 12 unitsOpen key concepts →

Exam info

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Type
Exam
Field
Education
Provider
GED Testing Service
Sections
Life Science (16) · Physical Science (16) · Earth and Space Science (8)
Questions · Time
40 questions · 90 min
Format
The official GED site lists the Science test as 90 minutes in 1 part with no break (including 2 minutes of instructions and final review) and an on-screen calculator. Question types include multiple choice, fill-in-the-blank, drag and drop, hot spot, and drop-down. GED Testing Service's Assessment Guide says about 40% of the test is life science, 40% physical science, and 20% Earth and space science, that questions test science practices such as reading graphs, designing experiments, and reasoning from data, and that about half of the questions come in sets of two or three about one passage or graphic. The questions give the formulas and details you need. GED Testing Service does not publish a fixed number of questions on its site; this practice mock uses 40 four-choice questions (16 life science, 16 physical science, 8 Earth and space science) in 90 minutes. All questions on this site are original AI-written practice questions.
Passing score
The real test is scored on a scale of 100 to 200, and you pass with 145 or higher. GED Testing Service does not publish a percent-correct cutoff, so this site uses 65% correct as a practice goal only. It is not an official score.
Eligibility
The GED test is for adults who did not finish high school. Age limits, residency rules, and fees are set by each state. Check your state's rules on ged.com before you schedule.

Exam outline

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Tap a unit name to see its key concepts and sample questions.

Life Science16 questions

  1. Unit 1: Human Body and Health★★★★★Weight 20%Concepts
  2. Unit 2: Energy for Life: Photosynthesis and Respiration★★★★☆Weight 15%Concepts
  3. Unit 3: Ecosystems and Energy Flow★★★★★Weight 20%Concepts
  4. Unit 4: Cells and the Organization of Life★★★☆☆Weight 15%Concepts
  5. Unit 5: Heredity and DNA★★★★★Weight 20%Concepts
  6. Unit 6: Evolution and Natural Selection★★★☆☆Weight 10%Concepts

Physical Science16 questions

  1. Unit 1: Energy, Heat, and Waves★★★★★Weight 35%Concepts
  2. Unit 2: Motion, Forces, and Work★★★★★Weight 30%Concepts
  3. Unit 3: Matter and Chemical Reactions★★★★★Weight 35%Concepts

Earth and Space Science8 questions

  1. Unit 1: Earth's Resources, Cycles, and Natural Hazards★★★★☆Weight 35%Concepts
  2. Unit 2: Atmosphere, Oceans, and Earth's Interior★★★★☆Weight 40%Concepts
  3. Unit 3: Space and Earth's History★★★☆☆Weight 25%Concepts

GED Science study tips

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Study order
Start with Life Science and Physical Science, because each is about 40% of the test. In Life Science, Human Body and Health, Ecosystems and Energy Flow, and Heredity and DNA carry the most weight in this site's outline. In Physical Science, give equal time to Energy, Heat, and Waves and to Matter and Chemical Reactions, then Motion, Forces, and Work. Finish with Earth and Space Science, which is about 20%.
Topics people often miss
In Heredity and DNA, set up the Punnett square on paper before you choose a percent, and check whether the question asks for the dominant or the recessive trait. In Motion, Forces, and Work, write the formula the question gives and put the numbers in the right places, because dividing instead of multiplying is an easy slip. In Ecosystems and Energy Flow, remember that food web arrows point from the food to the eater.
Test day tips
You have 90 minutes in one part with no break, and about half the questions come in groups about one passage or graph. Read the question first, then look in the passage or graph for the exact information it asks about. Use the on-screen calculator for averages, density, and speed, and mark hard questions to come back to before time runs out.
▼ More about GED Science (trends · overview · FAQ)▲ Hide

GED Science exam trends

GED Testing Service builds the test from three content areas: life science (about 40%), physical science (about 40%), and Earth and space science (about 20%). Its two focusing themes are Human Health and Living Systems, and Energy and Related Systems, so expect topics such as body systems and disease, heredity and Punnett squares, food webs and energy flow, heat and energy changes, forces and motion, chemical reactions and density, and Earth's resources and natural hazards. Many questions ask you to find the variables in an experiment, read a graph or table, or decide which conclusion the data support.

Practice reading short science passages and data tables, and ask yourself what was changed, what was measured, and what stayed the same. Learn the basic ideas in each topic, such as how photosynthesis and respiration are linked, but do not try to memorize every fact. Practice simple calculations like averages, speed, density, and Punnett square chances using the formulas the question gives.

GED Science Sample Questions and Explanations →

About GED Science

The GED Science test is one of the four GED tests you must pass to earn a high school equivalency credential. It checks whether you can read science passages, graphs, and tables, understand how experiments are set up, and reason from data in life science, physical science, and Earth and space science. It is not a memorization test: questions give you the details and formulas you need, and you have an on-screen calculator.

FAQ

Q. What score do I need to pass GED Science?
The GED site says you need 145 out of 200 on each test, including Science. GED Testing Service does not publish how many questions you must get right, so this site uses 65% correct as a practice goal.
Q. How long is the GED Science test?
The official GED site lists 90 minutes in one part with no break. That time includes about 2 minutes for instructions and a final review.
Q. Do I need to memorize the periodic table or science formulas?
No. The GED site says you do not need to memorize the periodic table, but you should recognize the names and symbols of key elements. GED Testing Service says the questions give the details and formulas you need. An on-screen calculator is available.
Q. Are these real GED questions?
No. GED Testing Service does not publish its test questions. Every question on this site is an original AI-written practice question based on the official assessment targets, and they may contain errors. Please report anything that looks wrong.

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