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Public learning track
Atomic Structure, Periodic Trends, and Chemical Bonding
9th Grade · Track 270 of 447 · 11 lessons
11 lessons
Goal
Model electron configurations, analyze periodic trends, and explain bonding mechanisms and intermolecular forces in crystalline and molecular structures.
Featured Diagrams
Quantum Subshells and Atomic Orbitals
Public learning track
Cell Ultrastructure, Microscopy, and Endosymbiosis
9th Grade · Track 271 of 447 · 6 lessons
6 lessons
Goal
Compare prokaryotic and eukaryotic cellular ultrastructures, explain the endosymbiotic theory of organelle evolution, and apply microscopy techniques to analyze specimen dimensions.
Featured Diagrams
Cell Structure: Eukaryotic vs Prokaryotic Cells
Public learning track
DNA Structure, the Universal Genetic Code, and Protein Synthesis
9th Grade · Track 272 of 447 · 7 lessons
7 lessons
Goal
Explain DNA molecular architecture, the universality of the genetic code, and the sequential processes of transcription and translation.
Featured Diagrams
DNA Structure: Nucleotides, Base Pairs, and the Double Helix
Public learning track
Ecosystem Dynamics, Energy Flow, and Community Succession
9th Grade · Track 273 of 447 · 8 lessons
8 lessons
Goal
Model ecological organization from organisms to biomes, calculate energy and biomass transfers across trophic levels, and analyze how biotic, abiotic, and symbiotic interactions drive ecological succession.
Featured Diagrams
Levels of Ecological Organization: From Organisms to Biomes
Public learning track
Experimental Design, Hypothesis Generation, and Risk Assessment
9th Grade · Track 274 of 447 · 8 lessons
8 lessons
Goal
Formulate testable scientific questions and hypotheses, design controlled and comparative investigations, and systematically evaluate experimental risks.
Featured Diagrams
Formulating Testable Questions and Falsifiable Hypotheses
Public learning track
Forces, Newton's Laws, Gravitation, and Fluid Mechanics
9th Grade · Track 275 of 447 · 13 lessons
13 lessons
Goal
Analyze forces and motion mathematically to predict mechanical interactions, momentum exchanges, gravitational attractions, and fluid behaviors.
Featured Diagrams
Using the Speed Formula: v = d / t to Calculate Speed
Public learning track
Plant Anatomy, Transport, and Physiological Responses
9th Grade · Track 276 of 447 · 8 lessons
8 lessons
Goal
Explain plant tissue organization, vascular transport mechanisms, stomatal regulation, floral reproduction, and hormonal tropisms.
Featured Diagrams
Root and Leaf Structures in Water Absorption and Transpiration
Public learning track
Biogeochemical Cycles and Earth Systems
9th Grade · Track 277 of 447 · 8 lessons
8 lessons
Goal
Analyze the movement of carbon, nitrogen, and water across Earth's spheres and assess how biological processes and anthropogenic disruptions influence climate equilibrium.
Featured Diagrams
How Water Cycles Through Earth's Systems
Public learning track
Biomolecules and Biochemical Testing Methods
9th Grade · Track 278 of 447 · 7 lessons
7 lessons
Goal
Analyze the molecular structures, monomeric subunits, and physiological functions of carbohydrates, lipids, proteins, and nucleic acids, and execute biochemical identification assays.
Featured Diagrams
Monosaccharides, Disaccharides, and Polysaccharide Polymers
Public learning track
Human Circulatory and Gas Exchange Systems
9th Grade · Track 279 of 447 · 8 lessons
8 lessons
Goal
Analyze the structural adaptations of the heart, blood vessels, blood components, and respiratory organs for mass transport and gas exchange.
Featured Diagrams
The Need for a Circulatory System in Active Animals