Free GED Science Exam Prep

Cell biology and organelles, photosynthesis and cellular respiration, genetics and heredity (Punnett squares, dominant/recessive, inheritance patterns), evolution and natural selection, ecosystems and ecology (food webs, population dynamics, symbiosis, biomes), human body systems (circulatory, nervous, digestive, endocrine, excretory, immune, skeletal), and microbiology basics (viruses vs. cells).

Atoms, elements, and the periodic table; chemical reactions (balancing equations, conservation of mass, reaction rates, endothermic vs. exothermic reactions); acids and bases (pH scale, neutralization); states of matter and phase changes; forces and motion (Newton's laws, net force, acceleration); energy (kinetic, potential, conservation of energy); electricity (circuits, conductors, insulators); waves (sound, light, electromagnetic spectrum); and thermodynamics.

Earth's structure (crust, mantle, outer and inner core); plate tectonics (convergent, divergent, transform boundaries; earthquakes and volcanoes); rock cycle (igneous, sedimentary, metamorphic); geologic time and fossil record (superposition, radiometric dating); water cycle; weather and climate (atmosphere layers, greenhouse effect, climate change); ocean currents; solar system (planet order, tides, seasons); and stellar evolution (nuclear fusion in stars).