This document presents a number of theories, both plausible and implausible or even humorous, for the extinction of the dinosaurs. Links to a glossary are embedded in the text. A reading list and links to related sites are also provided.
This activity includes an assessment, analysis, and action tool that can be used by classrooms to promote understanding of how the complex current issues of energy, pollution, supply and consumption are not just global but also local issues.
This video adapted from the Valdez Museum & Historical Archive, explores what happened during the Great Alaska Earthquake of 1964 through original footage, first-person accounts, and animations illustrating plate tectonics. ***Access to Teacher's Domain content now requires free login to PBS Learning Media.
This dataset, created by Robin H. Locke of St. Lawrence University, describes 93 new cars for the 1993 model year with 26 variables, including price, mpg ratings, and engine size. It also illustrates a broad range of statistical techniques such as box-whisker plot, confidence intervals, difference in means, one-way ANOVA, contingency table, scatterplot, regression, and correlation. If further research is required the author has included a list of references.
This movie shows a total eclipse of the Sun which occurred in 1994. It is accompanied by a link to a written description of the Sun's physical characteristics.
3D interactive model of 1H-indene C₉H₈ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1H-pyrazole C₃H₄N₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1H-pyridine-2-thione C₅H₅NS for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1H-pyrrole C₄H₅N for demonstrating molecular geometry, vibrations, symmetry and orbitals.
This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important aspects of the task and its potential use.
This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important aspects of the task and its potential use.
This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important aspects of the task and its potential use.
3D interactive model of 1R_2S-1_2-diaminocyclohexane C₆H₁₄N₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1R_2S-1_2-dimethylcyclopentane C₇H₁₄ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1R_3S-1_3-dimethylcyclopentane C₇H₁₄ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1R-camphene C₁₀H₁₆ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1R-camphor C₁₀H₁₆O for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1S_2R-1_2-diphenylethane-1_2-diol C₁₄H₁₄O₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1S_2S-1_2-diaminocyclohexane C₆H₁₄N₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1S_2S-1-ethyl-2-methylcyclopentane C₈H₁₆ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_10-phenanthroline C₁₂H₈N₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_1_1_2_2_2-hexafluoroethane C₂F₆ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_1_1_2_2-pentafluoroethane C₂HF₅ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_1_1_3_3_3-hexafluoropropan-2-ol C₃H₂F₆O for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_1_1-trichloroacetonitrile C₂Cl₃N for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_1_1-trichloroethane C₂H₃Cl₃ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_1_2_2-tetrachloroethane C₂H₂Cl₄ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_2-oxazole C₃H₃NO for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_2-thiazole C₃H₃NS for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_2-xylene C₈H₁₀ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_3_5-trichloro-2-methoxybenzene C₇H₅Cl₃O for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_3_5-trimethylbenzene C₉H₁₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_3-dichloropropane C₃H₆Cl₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_3-thiazole C₃H₃NS for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_3-xylene C₈H₁₀ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_4_7_10_13_16-hexaoxacyclooctadecane C₁₂H₂₄O₆ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_4-dichlorobut-2-yne C₄H₄Cl₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_4-dioxane C₄H₈O₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_4-xylene C₈H₁₀ for demonstrating molecular geometry, vibrations, symmetry and orbitals.
3D interactive model of 1_5-diaminopentane C₅H₁₄N₂ for demonstrating molecular geometry, vibrations, symmetry and orbitals.