ASVAB General Science Study Hub
Review life, earth, space, and physical science while practicing the relationships the test actually measures.
ASVAB General Science Practice Center
Take a full practice test, review the explanations, then use the flashcards to repair the terms and ideas that slowed you down.
ASVAB General Science Study Blueprint
Open each area to see what to master. The bars show how this hub distributes its lessons, so you can plan study time without mistaking the map for an official exam weighting.
01 Scientific thinking and evidenceRead measurements, experiments, graphs, and scientific claims. 9lessons
- Scientific method, variables, and controls
- Units, data patterns, and evidence quality
02 Matter and chemistryExplain material properties and changes with atomic and molecular models. 4lessons
- Atoms, elements, compounds, and bonding
- Reactions, mixtures, solutions, acids, and bases
03 Cells, heredity, and living systemsConnect cellular processes to genetics, organisms, and body function. 9lessons
- Cells, energy, DNA, inheritance, and reproduction
- Human systems, health, and microorganisms
04 Evolution and ecologyExplain adaptation and interactions among organisms and environments. 5lessons
- Natural selection and classification
- Food webs, populations, cycles, and ecosystems
05 Earth, weather, oceans, and spaceInterpret Earth systems and the larger astronomical setting. 9lessons
- Rocks, plate tectonics, weather, climate, and water
- Solar system, stars, galaxies, and the universe
Study-map shares describe the learning resources on this page. They are not presented as official test percentages.
Effortless Math · Science Study Library
Use this companion library to refresh a science idea, see how the pieces connect, and return to your book ready to work a fresh question. The lessons below are reusable science resources, not official ASVAB materials.
Use the hub in a focused loop
Choose one topic that slowed you down, study the short lesson, then retry a related question without looking at the answer. A few careful cycles teach more than rereading an entire chapter at once.
Science lessons and refreshers
Every link below opens a live Effortless Math science lesson in a new tab. Start with the group that matches the chapter you are reviewing.
Scientific thinking and evidence
- Claims in Science: What Is Being Argued
- Evidence: The Support Behind a Claim
- Conclusions: What the Evidence Allows
- Independent and Dependent Variables
- Controlled Variables and the Control Group
- Hypotheses and Judging a Good Experiment
- Reading Scientific Data Tables
- Bar Graphs and Line Graphs in Science
- Trends and Predictions From Data
Matter and chemistry
Cells, heredity, and living systems
Evolution and ecology
Motion, forces, and energy
Earth, weather, oceans, and space
- Earth’s Layers and Plate Tectonics
- Rocks and the Rock Cycle
- Natural Hazards and the Age of Earth
- The Water Cycle and Weather
- Climate and the Greenhouse Effect
- Atmosphere, Oceans, and Earth Systems
- The Solar System
- Earth, Moon, and Sun: Days, Seasons, Phases, and Tides
- Stars, Galaxies, and the Universe
Quick-review flashcards
Open a card, say the answer before reading it, then close it and move to the next one. These cards focus on relationships that show up across many science questions.
Independent variable
The factor a scientist changes on purpose in an experiment.
Dependent variable
The result a scientist measures to see the effect of a change.
Control group
A comparison group that does not receive the tested treatment.
Density
How much mass is packed into a given volume.
Atom
The basic unit of an element, made of protons, neutrons, and electrons.
Conservation of mass
In an ordinary chemical reaction, matter is rearranged rather than created or destroyed.
Cell
The smallest unit that can carry out the functions of life.
Photosynthesis
Plants use light energy, water, and carbon dioxide to make sugars and release oxygen.
Cellular respiration
Cells release usable energy from food molecules, usually using oxygen.
Natural selection
Inherited traits that improve survival or reproduction can become more common over generations.
Food web
A model showing several connected feeding relationships in an ecosystem.
Homeostasis
The process of keeping internal conditions within a workable range.
Plate tectonics
Earth’s outer shell is broken into moving plates whose interactions shape the surface.
Water cycle
Water moves through evaporation, condensation, precipitation, runoff, and storage.
Force
A push or pull that can change an object’s motion.
Potential energy
Stored energy associated with position, arrangement, or condition.
Electromagnetic spectrum
The full range of electromagnetic waves, from radio waves to gamma rays.
Solar system
The Sun and the objects held by its gravity, including planets, moons, and smaller bodies.
Velocity
Speed described with both an amount and a direction.
Chemical change
A change that forms one or more new substances with different properties.
Every lesson in one place
Open a lesson in a new tab and keep this hub nearby as your study home.