This chemistry video tutorial explains the difference of accuracy and precision in measurement. This video gives an example of four students attempting to measure the density of aluminum and asks which data is accurate but not precise. Accuracy has to do with how close your data is to the accepted value and precision has to do with how close your data is with each other. Chemistry - Free Formula Sheets: Final Exam and Test Prep Videos: ________________________________ Chemistry - Basic Introduction: Scientific Notation Review: Significant Figures Review: Unit Conversion Problems: Accuracy and Precision: Density Practice Problems: ________________________________ Pure Substances & Mixtures: Homogeneous & Heterogeneous Mixtures: Physical and Chemical Changes: Solids, Liquids, Gases, & Plasma: Physical Vs Chemical Properties: __________________________________ Law of Conservation of Mass: Law of Definite Proportions: Law of Multiple Proportions: Rutherford's Gold Foil Experiment: Cathode Ray Tube Experiment: _________________________________ Atoms - Basic Introduction: Cations and Anions Explained: Diatomic Elements & Molecules: Elements, Atoms, & Molecules: Protons, Neutrons, & Electrons: _______________________________ Final Exams and Video Playlists: Full-Length Videos and Worksheets: