Public learning track
Pure Substances, Mixtures, and the Periodic Table
7th Grade · Science · Open Global Science
7 lessons
Goal
Classify matter into elements, compounds, and mixtures, use chemical formulas, and apply periodic trends to predict reactivity.
7 lessons
0 of 7 done
- 1Particle Model of Pure Substances vs MixturesUp nextStart
- 2Separating Mixtures Using Physical PropertiesPremiumNot started yet
- 3Identifying Elements by Their Proton NumberNot started yet
- 4Using the Periodic Table to Identify Atoms in a FormulaNot started yet
- 5Distinguishing Physical and Chemical ChangesNot started yet
- 6Combining Elements to Form Diverse CompoundsNot started yet
- 7Using Periodic Patterns to Predict Properties of Unknown ElementsNot started yet
Standards Covered
- OGS.8.PS.2Open Global Science Standards 2026™ · Science · Level 8 / Grade 7 (Age 12) · Grade 7Differentiate between pure substances (elements and compounds) and mixtures (heterogeneous and homogeneous solutions), using chemical symbols, formulas, and particle diagrams, and analyze separation techniques based on physical properties.
- OGS.8.PS.3Open Global Science Standards 2026™ · Science · Level 8 / Grade 7 (Age 12) · Grade 7Distinguish between physical and chemical changes in matter, explaining how a limited number of elements combine to form diverse compounds, and interpret the periodic table to identify atomic composition and predict chemical properties.
Curriculum Framework
7th Grade · Science · Open Global Science
1
8 lessons
Matter, Density, and Kinetic-Molecular Theory
Explain states of matter, thermal expansion, diffusion, and Brownian motion using particle models, and calculate mass, volume, and density.
2
7 lessons
Pure Substances, Mixtures, and the Periodic Table
Classify matter into elements, compounds, and mixtures, use chemical formulas, and apply periodic trends to predict reactivity.
3
6 lessons
Inorganic Compounds, Acids, Bases, and Salts
Analyze inorganic classes, electrolytic dissociation, pH balance, and neutralization reactions.
4
7 lessons
Kinematics: One- and Two-Dimensional Motion
Analyze motion using scalar and vector quantities, calculate velocity and acceleration, and interpret kinematic graphs.
5
8 lessons
Dynamics, Newton's Laws, and Friction
Apply Newton's three laws of motion, momentum conservation, and friction models to describe object dynamics.
6
7 lessons
Rotational Motion and Fluid Mechanics
Model circular motion dynamics, hydrostatic pressure, communicating vessels, and Archimedes' principle.
7
9 lessons
Work, Power, Energy, and Oscillations
Calculate mechanical work, power, kinetic and potential energy, simple machine efficiency, and simple harmonic oscillations.
8
8 lessons
Thermal Physics and Thermodynamics
Investigate conduction, convection, radiation, specific heat, latent heat, and thermodynamic laws.
9
10 lessons
Electrostatics and Direct-Current Circuits
Analyze electric charges, fields, potentials, and construct DC circuits using Ohm's, Joule's, and Kirchhoff's laws.
10
7 lessons
Electromagnetism, Induction, and AC Systems
Investigate magnetic fields, electromagnetic induction, motors, transformers, relays, and alternating current.
11
7 lessons
Wave Phenomena and Geometric Optics
Model wave behaviors including interference, diffraction, Doppler effect, reflection, refraction, and optical technologies.
12
11 lessons
Quantum Phenomena and Nuclear Physics
Analyze wave-particle duality, atomic emission/absorption spectra, radioactive decay, nuclear reactions, and mass-energy equivalence.