Matter and Materials
Atoms, molecules, properties of substances, synthetic materials, and particle motion.
Grade level
Middle School Science
Middle school science courses and quizzes with approachable practice in space, water, matter, energy, ecosystems, and Earth science.
How to use this grade page
Middle school science introduces larger systems and more careful evidence-based explanations. These pages keep the wording approachable while still preparing students for ideas such as energy transfer, Earth systems, ecosystems, waves, matter, climate, and space. Students can use the quizzes for review and the courses for deeper practice.
Students can move between topic pages, course pages, and quizzes without losing the larger learning path. Course pages give lesson context, while quizzes provide quick practice and score tracking for logged-in users.
Recommended links
Courses
Chemical Changes
Chemical reactions, conservation of mass, energy changes, and designing solutions with reactions.
Forces and Motion
Newton's laws, force diagrams, gravitational, electric, and magnetic interactions.
Energy Systems
Kinetic energy, potential energy, thermal energy, energy transfer, and design.
Waves and Light
Wave properties, sound and light interactions, electromagnetic radiation, and information technologies.
Body Systems and Senses
Cells, body systems, sense receptors, brain processing, and organism responses.
Ecosystems and Energy Flow
Photosynthesis, cellular respiration, food molecules, energy flow, and matter cycling.
Ecosystem Connections
Populations, resources, interactions, biodiversity, and ecosystem changes.
Growth and Reproduction
Growth, reproduction, genes, chromosomes, inheritance, and environmental influences.
Adaptations and Survival
Fossil evidence, variation, natural selection, adaptation, and changes in populations over time.
Space Systems
Earth-Sun-Moon patterns, gravity, solar system scale, and seasons.
Earth's Story
Geologic time, rock strata, fossils, plate motions, and Earth's history.
Earth Systems
Earth materials, rock cycle, water cycle, weather systems, and natural resources.
Weather and Climate
Weather patterns, climate factors, air masses, ocean currents, and climate change evidence.
People and the Planet
Natural hazards, resource use, environmental impacts, population growth, and solutions.
Engineering Design Challenges
Define problems, evaluate solutions, analyze test data, and optimize designs.
