Description
Science
Learn science step by step through focused lessons, practice, quizzes, and games.
Physics
Mechanics, forces, energy, electricity, waves, and modern physics.
Continue learningChemistry
Atoms and elements, Molecules and formulas, States of matter, Mixtures and solutions, Chemical reactions, Acids, bases, and pH
Continue learningBiology
Cells, Photosynthesis, Cellular respiration, DNA and genes, Inheritance and environment, Ecosystems
Continue learningGeography
Read maps, understand Earth systems, and explore how people interact with places. Build from everyday map skills to interpreting geographic evidence.
Continue learningAstronomy
Explore the sky, the Solar System, stars, and galaxies. Learn how observations and physical models help us understand the universe.
Continue learningEnvironmental Science
Explore connections among ecosystems, water, land, and human activities. Learn how resources and pollution move through systems, and use evidence to compare environmental choices.
Continue learningGeology
Explore rocks, minerals, and Earth’s changing structure. Read evidence of plate movement, reconstruct geological history, and distinguish observations from interpretations.
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