In the summer of 1815, snow fell every month in New England. Was this related to the volcanic eruption of Tambora in Indonesia earlier in the year? Young scientists design their own experiments to research the long-term effect a volcanic...

Science rocks! Explore three types of rocks and the rock cycle with an igneous rocks experiment. Pupils discuss textures, composition, and learn how melts are formed from the Earth's crust. They weigh materials using a scientific scale...

[Free Registration/Login may be required to access all resource tools.] Summarizes the key points about atmospheric processes involving air pressure, air density, and temperature. Includes a few questions to check for understanding.

This introduction to the atmosphere details the important properties of the atmosphere: temperature, pressure, and humidity.

This two-part resource explores the vertical structure of Earth's atmosphere. Content details the atmospheric layers, and the relationship between pressure and height in the atmosphere.

Explains what a pressure gradient is and how it produces air movement.

This site looks at the important surface features to consider when making a forecast. High pressure and atmospheric pressure is explained. Be sure to use the arrows at the bottom to navigate through this site.

Explains how to read a barometer and interpret its meaning, as well as how the barometer was invented.

Learn about the atmosphere, it's make-up, the layers, the hydrologic cycle and more. The National Weather Service presents this site, including learning lessons and review questions.

Explains different types of pressure, the characteristics of absolute and gauge pressure, and their differences and similarities.

This site provides an extensive amount of weather information. Includes current information, forecasting, and historic weather related events. Weather map symbols and terminology explained.

Discusses the fronts and weather patterns associated with low pressure areas.

Read about regional and local wind systems, including information on changes in atmospheric pressure, thermal energy in the atmosphere, sea and land breezes, mountain and valley breezes, and monsoon winds.

This comprehensive study guide covers the main terms and concepts needed for an earth science unit on circulation in the atmosphere. Review questions are included at the bottom of the study guide.

This page deals with the composition of the earth's first atmosphere and how it has changed. Also the elements and percentages that make up our current atmosphere are listed.

Interactive media is used to explain the differences between high pressure and low pressure weather systems.

Discusses air pressure, fronts, and storm formation. Links on page to well-illustrated and animated additional information.

A wonderfully complete primer on exothermic reactions in the context of chemical spills. Covers Reactions with Air or Water, Combustible Organics, Polymerization Reax, Decomposition, Corrosion, and much much more.

A scientific explanation of what a boiling point is, the factors that can alter a liquid's boiling point, changes of state that occur at the boiling point, and how the normal boiling point relates to a liquid's vapor pressure. (Updated:...

Provides a great introduction to Boyle's Law as well as a link to a more detailed explanation if that's what you're looking for. Gives a real life example that is very helpful in comprehending the law.

This site from the University of Oregon provides a great explanation of the Coriolis Effect and then gives several chart type examples to help the understanding of it.

This Wikipedia site tells all about weather fronts, or boundaries between two air masses with differing characteristics. Includes many hyperlinked terms to additional information on related subjects.

The concepts of melting point and freezing point are explained on this site.