This PDF document discusses a field activity for K-12 students. The purpose of the activity is to observe type and cover of clouds including contrails. Students will observe ten types of clouds and how many of three types of contrails are visible, how much of the sky is covered with clouds, and how much is covered by contrails. The PDF is an instructor guide with detailed advice for administering ... Full description.

The World Population Prospects allows users to change variables to learn about population prospects in the world. Users can change variables such as population, population density, location, date and variant in the basic panel to obtain basic output while a second panel allows users to obtain more detailed information such as median age, total fertility rate and population by age. There are also full ... Full description.

This site is an animated pyramid graph depicting the population of the US by age and sex from 1950 to 2050. The animation runs continuously. Links to other animations and a homepage are also available. Full description.

This website contains eight maps showing human population density starting in 1 AD. Maps can be viewed as large single maps or as an animation of population change through time. The maps are from a Social Contract article by John H. Hanton, 'End of the Migration Epoch.' Full description.

This site from SERC's Starting Point presents sample Gallery Walk questions for an activity about map reading. These questions encourage students to examine lines of latitude and longitude, read representative fractions, identify landforms on topographic maps, ways to use road, contour, bedrock, soil, satellite, and aerial maps, and how to critique maps. The questions are organized according to the ... Full description.

This National Geographic news article from December 2001 outlines the eruptive progress of Popocatepetl volcano in Mexico. The article discusses the difficulties of evacuating locals during volcanic disasters because of their overall beliefs that the volcano is their "friend." Users can also link to other National Geographic news stories, special news series and the main National Geographic site. Full description.

NASA Astronomy Photo of the Day website hosted this photo of Earth at night in November 2000. The photo shows what Earth looks like at night with urban centers highlighted by concentrations of city lights. The image is a composite of hundreds of satellite photographs taken by orbiting Defense Meteorological Satellites Program satellites. Full description.

In this example, a field laboratory in introductory geology becomes a test of a hypothesis: Does the model proposed by Stanley Trimble for Coon Creek, Wisconsin adequately describe the history of post-European-settlement erosion and deposition in a small drainage in southeast Minnesota? This field lab is detailed on the site, which describes leaning goals, a context for this lab's use, teaching notes ... Full description.

In this activity, students access and visualize world population data using the user friendly MyWorld GIS software. Data includes total population, population density, projected population, male and female population, and age specific population, etc. On this Starting Point page, users can access information about the exercise's learning goals, context for use, teaching notes and tips, teaching materials, ... Full description.

The purpose of this lesson is to familiarize students with the different types of transnational pollution, and to give them an opportunity to role play in a hypothetical case of transnational pollution on the Danube River. This lesson introduces the grandest and most threatening problem of the global environment-transnational pollution. The flow of pollutants across national boundaries has confirmed ... Full description.