How to combine data from a database using SQL.
Students will explore global climatic datasets to analyze the factors that constrain and enable agricultural options.
GeoInquiries are designed to be fast and easy-to-use instructional resources that incorporate advanced web mapping technology. Each 15-minute activity in a collection is intended to be presented by the instructor from a single computer/projector classroom arrangement. No installation, fees, or logins are necessary to use these materials and software.
Thinking about how we get Calories from the land limits human population densities. Created by Sal Khan.
Thinking about how we get Calories from the land limits human population densities. Created by Sal Khan.
How long of a runway does an A380 need? Created by Sal Khan.
Figuring how long it takes an A380 to take off given a constant acceleration. Created by Sal Khan.
In this video adapted from KUAC-TV and the Geophysical Institute at the University of Alaska, Fairbanks, Alaska Native students contribute to research on how their environment is changing as a result of global warming.
Alcohol or ethanol fermentation, including yeast and its role in bread and wine production.
How did Alexander the Great take over Persia? Sal explains.
Alexander the Great takes power.
"Democracy in America" by Alexis de Tocqueville is one of the most influential books ever written about America. While historians have viewed "Democracy" as a rich source about the age of Andrew Jackson, Tocqueville was more of a political thinker than a historian. His "new political science" offers insights into the problematic issues faced by democratic society.
Students are introduced to biofuels, biological engineers, algae and how they grow (photosynthesis), and what parts of algae can be used for biofuel (biomass from oils, starches, cell wall sugars). Through this lesson, plants—and specifically algae—are presented as an energy solution. Students learn that breaking apart algal cell walls enables access to oil, starch, and cell wall sugars for biofuel production. Students compare/contrast biofuels and fossil fuels. They learn about the field of biological engineering, including what biological engineers do. A 20-slide PowerPoint® presentation is provided that supports students taking notes in the Cornell format. Short pre- and post-quizzes are provided. This lesson prepares students to conduct the associated activity in which they make and then eat edible algal cell models.
How can we improve the speed of a (deterministic) primality test? Created by Brit Cruise.
Students learn about linear programming (also called linear optimization) to solve engineering design problems. As they work through a word problem as a class, they learn about the ideas of constraints, feasibility and optimization related to graphing linear equalities. Then they apply this information to solve two practice engineering design problems related to optimizing materials and cost by graphing inequalities, determining coordinates and equations from their graphs, and solving their equations. It is suggested that students conduct the associated activity, Optimizing Pencils in a Tray, before this lesson, although either order is acceptable.
Allele frequencies in populations and how they differ from genotype frequencies. Created by Sal Khan.
A gene as a stretch of DNA on a chromosome. Alleles as versions (sequence variants) of a gene.
Outline of the 1973 Allende Coup in Chile and Pinochet's Junta (this video under CC-BY-SA). Created by Sal Khan.
There are a number of European alliances that contributed to the broad scope of World War I. Prominent among these are the 1839 Treaty of London, which promised that the United Kingdom would protect Belgium's neutrality, the 1879 Dual Alliance treaty between Germany and Austria-Hungary to protect each other in the event of Russian attack, the 1892 Franco-Russian Military Convention that promised mutual assistance in the face of attack, the Triple Entente linking the United Kingdom and France (and later Italy), and the Triple Alliance linking Germany, Austria-Hungary, and Italy (at first). Created by Sal Khan.
Marginal Utility and maximization. Created by Sal Khan.
Students define and classify alloys as mixtures, while comparing and contrasting the properties of alloys to those of pure substances. Students learn that engineers investigate the structures and properties of alloys for biomedical and transportation applications. Pre- and post-assessment handouts are provided.