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9th Grade · Science · Open Global Science
Acids, Bases, Oxides, and Neutralization
Track 1 of 9 · 7 lessons
7 lessons
Classify acids, bases, and oxides, calculate pH, conduct volumetric titrations, and write full and net ionic neutralization equations.
Featured Diagrams
- 1Arrhenius and Brønsted-Lowry Acid-Base DefinitionsUp nextStart
- 2Brønsted-Lowry Acid-Base Theory and Conjugate PairsPremiumNot started yet
- 3Classifying Acidic, Basic, Amphoteric, and Neutral OxidesNot started yet
- 4The pH Scale and Acid-Base IndicatorsNot started yet
- 5Calculating pH and pOH for Strong Acids and BasesNot started yet
- 6Acid-Base Titration CalculationsNot started yet
- 7Net Ionic Equations for Acid-Base Neutralization ReactionsNot started yet
Atomic Structure, Periodic Trends, and Chemical Bonding
Track 2 of 9 · 11 lessons
11 lessons
Model electron configurations, analyze periodic trends, and explain bonding mechanisms and intermolecular forces in crystalline and molecular structures.
Featured Diagrams
- 1Quantum Subshells and Atomic OrbitalsUp nextStart
- 2Writing Electron Configurations for Main Group ElementsPremiumNot started yet
- 3Electron Configurations of Transition Metals and AnomaliesNot started yet
- 4Periodic Trends: Atomic and Ionic RadiiNot started yet
- 5First Ionisation Energy Trends Across Periods and Down GroupsNot started yet
- 6Electronegativity, Valency, and Chemical Reactivity TrendsNot started yet
- 7Ionic Bonding, Electron Transfer, and Lattice EnergyNot started yet
- 8Covalent Bonding and Coordinate Covalent StructuresNot started yet
- 9VSEPR Theory: Predicting Molecular ShapesNot started yet
- 10Metallic Bonding and Crystal Lattice PropertiesNot started yet
- 11Intermolecular Forces and Physical States of MatterNot started yet
Biogeochemical Cycles and Earth Systems
Track 3 of 9 · 8 lessons
8 lessons
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
- 1How Water Cycles Through Earth's SystemsUp nextStart
- 2Carbon Cycling Among Biosphere, Atmosphere, Hydrosphere, and GeospherePremiumNot started yet
- 3The Role of Photosynthesis and Respiration in the Carbon CycleNot started yet
- 4The Nitrogen Cycle: Fixation, Nitrification, and DenitrificationNot started yet
- 5Decomposers and Nutrient Recycling in SoilsNot started yet
- 6Fossil Fuel Combustion and Atmospheric Carbon DisruptionNot started yet
- 7Anthropogenic Nutrient Loading and EutrophicationNot started yet
- 8Biogeochemical Feedbacks and Global Climate EquilibriumNot started yet
Biomolecules and Biochemical Testing Methods
Track 4 of 9 · 7 lessons
7 lessons
Analyze the molecular structures, monomeric subunits, and physiological functions of carbohydrates, lipids, proteins, and nucleic acids, and execute biochemical identification assays.
Featured Diagrams
- 1Monosaccharides, Disaccharides, and Polysaccharide PolymersUp nextStart
- 2Biochemical Testing for Reducing Sugars and StarchPremiumNot started yet
- 3Lipid Structure: Triglycerides and PhospholipidsNot started yet
- 4Biochemical Testing for Lipids: Emulsion and Sudan AssaysNot started yet
- 5Amino Acid Monomers and Hierarchical Protein StructureNot started yet
- 6Biochemical Testing for Proteins Using the Biuret ReagentNot started yet
- 7Comparing DNA and RNA Structures and FunctionsNot started yet
Cell Cycle, Mitosis, Differentiation, and Cancer
Track 5 of 9 · 8 lessons
8 lessons
Describe eukaryotic cell cycle phases, semiconservative DNA replication, and mitotic division, explain stem cell differentiation, and analyze oncogenic checkpoint failures.
Featured Diagrams
- 1Stages of the Eukaryotic Cell Cycle: Interphase and CheckpointsUp nextStart
- 2Semiconservative DNA Replication: Enzymes and Fork DynamicsPremiumNot started yet
- 3Phases of Mitosis: Prophase Through TelophaseNot started yet
- 4Cytokinesis in Animal and Plant CellsNot started yet
- 5Stem Cells: Unspecialized Cells With PotentialNot started yet
- 6From Specialized Cells to Tissues: Levels of OrganizationNot started yet
- 7Environmental Risk Factors for CancerNot started yet
- 8How Cancer Spreads: The Process of MetastasisNot started yet
Cell Ultrastructure, Microscopy, and Endosymbiosis
Track 6 of 9 · 6 lessons
6 lessons
Compare prokaryotic and eukaryotic cellular ultrastructures, explain the endosymbiotic theory of organelle evolution, and apply microscopy techniques to analyze specimen dimensions.
Featured Diagrams
- 1Cell Structure: Eukaryotic vs Prokaryotic CellsUp nextStart
- 2Eukaryotic Organelle Ultrastructure and FunctionsPremiumNot started yet
- 3Preparing and Staining Temporary Microscope MountsNot started yet
- 4Calculating Magnification, Image Size, and Actual SizeNot started yet
- 5Comparing Light and Electron Microscopy ResolutionNot started yet
- 6The Endosymbiotic Origin of Mitochondria and ChloroplastsNot started yet
Cellular Respiration and Energy Transfer
Track 7 of 9 · 7 lessons
7 lessons
Analyze cellular respiration as an exothermic catabolic pathway, comparing the biochemical stages of aerobic respiration with anaerobic fermentation.
Featured Diagrams
- 1ATP Structure, Hydrolysis, and Cellular Energy CouplingUp nextStart
- 2Glycolysis: Glucose Breakdown in the CytoplasmPremiumNot started yet
- 3The Link Reaction and Pyruvate DecarboxylationNot started yet
- 4Citric Acid Cycle: Enzymatic Steps and Carbon TurnoverNot started yet
- 5Oxidative Phosphorylation: Electron Transport and ChemiosmosisNot started yet
- 6Anaerobic Fermentation: Lactic Acid and Alcoholic PathwaysNot started yet
- 7Comparing Aerobic and Anaerobic Respiration PathwaysNot started yet
Chemical Kinetics and Dynamic Equilibrium
Track 8 of 9 · 7 lessons
7 lessons
Explain reaction rates using collision theory, analyze activation energy profiles with catalysts, and predict equilibrium shifts using Le Chatelier's principle.
Featured Diagrams
- 1Collision Theory and Activation EnergyUp nextStart
- 2Factors Affecting Reaction Rates: Temperature and ConcentrationPremiumNot started yet
- 3Catalysts and Reaction Energy ProfilesNot started yet
- 4Dynamic Chemical Equilibrium and the Reversible StateNot started yet
- 5Writing Equilibrium Constant Expressions: KcNot started yet
- 6Le Chatelier's Principle: Concentration and PressureNot started yet
- 7Le Chatelier's Principle: Temperature and Industrial EquilibriumNot started yet
DC Circuits, Electrical Power, and Electromagnetism
Track 9 of 9 · 12 lessons
12 lessons
Analyze series and parallel direct-current circuits using Ohm's law, calculate electrical energy use, and model electromagnetic induction in motors and generators.
Featured Diagrams
- 1Open and Closed Circuits: When Does Current Flow?Up nextStart
- 2Voltage, Current, and Resistance: Defining Circuit VariablesPremiumNot started yet
- 3Ohm's Law: Calculating Voltage, Current, and ResistanceNot started yet
- 4Series Circuits: Equivalent Resistance and Voltage DivisionNot started yet
- 5Parallel Circuits: Equivalent Resistance and Current BranchingNot started yet
- 6Comparing Series and Parallel CircuitsNot started yet
- 7Electric Power: Calculating Energy ConsumptionNot started yet
- 8Magnetic Fields Around Current-Carrying Wires and SolenoidsNot started yet
- 9The Motor Effect: Force on a Current-Carrying ConductorNot started yet
- 10How Electric Motors WorkNot started yet
- 11Faraday's Law and Electromagnetic InductionNot started yet
- 12The Electric Generator: Converting Mechanical Energy to CurrentNot started yet