This Java applet creates a model of a solar system with user-defined data. Users can create a solar system with up to four planets, choosing the star type at the center of the solar system, planet name, size, eccentricity of orbit and distance from the star. This site then calculates these factors to produce a graphic of the solar system with details about each planet such as its atmosphere, temperature, ... Full description.

This web-site contains three programs for calculating various information about our solar system. The Planetary Calculator allows users to compare the mass, size, spin periods, surface gravity and orbital information for each of the nine planets. Users can also create their own formulae to compare different combinations of properties. The Satellite Calculator allows users to compare physical and orbital ... Full description.

This website provides an easy-to-understand look at our weather system. Topics covered include the atmosphere, the water cycle, storms, ice and snow, weather forecasting and Earth's changing climate. There are features on ozone depletion, global warming, El Nino and La Nina. An activity allows users to identify cloud formations associated with tornadoes, complete with photographs. There is also a ... Full description.

This applet demonstrates how altitude impacts the distance a fly ball travels in a ballpark. Users choose a city (altitude), ball speed, and angle of departure with respect to the ground, and the program depicts the ball's trajectory. Full description.

This applet plots the incoming solar energy at the top of the atmosphere (no absorption by the atmosphere) for two locations at once. Students will learn how the date, hemisphere, and latitude impact the distribution of solar energy. Full description.

This interactive thermogram calculates stability parameters each time the user changes temperature and dewpoint values. The lifted parcel profile will appear as a different color. Full description.

This interactive online tool helps students grasp just how deep scientists must dive to study deep sea vents. By providing points of comparison, it puts the nearly unfathomable depth of the ocean floor into perspective. It compares the scale of a 2,400-meter (7,874-foot) dive against the height of famous landmarks such as the Empire State Building, the Eiffel Tower, and the Space Needle. Students ... Full description.

This mapping tool allows users to generate Earthquake Probability Maps (EPMs) for a region within 50 kilometers of a location specified by latitude and longitude or by ZIP code. The maps are color-coded; higher earthquake probabilities are indicated by orange and red colors, while lower probabilities are indicated by green or blue. Fault traces are marked in white; rivers are in blue. The maps are ... Full description.

This tide and tide prediction resource directory links to online tide predictors, tide observations/sea level measurements, tide prediction software you install to generate tide predictions on demand, and general information on tides and tide prediction. Full description.

At this site you can view either a map of the Earth showing the day and night regions at this moment, or view the Earth from the Sun, the Moon, the night side of the Earth, above any location on the planet specified by latitude, longitude and altitude, from a satellite in Earth orbit, or above various cities around the globe. Images can be generated based on a full-colour image of the Earth by day ... Full description.