Learn how an acidic solution is neutralized.

A detailed PowerPoint reviewing the neutral position the United States held at the beginning of World War II.

This personal site offers an article from the "Relevance" archive discusses why the United States decided to stop being neutral and get involved in the war. Preparedness movement is mentioned.

This structure was built in 1955 to provide a simulated zero-gravity environment in which engineers, designers, and astronauts could perform the various phases of research needed to gain firsthand knowledge concerning design and...

An interview with Robert Hallek who discusses the foreign policy decisions made by Franklin Roosevelt prior to World War II. Read about the commitment Roosevelt made to Winston Churchill to fight against the Nazis in Europe.

Presents key ideas for examining how George Washington responded to international events such as the French Revolution and the long-term impacts it had on America's relations with other countries.

This lesson will introduce the subatomic particles and explain where they are located and how they interact. It is 3 of 7 in the series titled "Subatomic Particles."

This lesson will introduce the subatomic particles and explain where they are located and how they interact. It is 7 of 7 in the series titled "Subatomic Particles."

A detail map of the Rock of Gibraltar in 1920, showing the area under British control, the neutral zone with Spain, and the town of Linea (La Linea de la Concepcion). This map includes O'Hara's Tower, the Moorish Castle, Breakneck...

A political map of the African continent in 1916, showing the European territorial claims established at the Berlin Conference in 1885. This map also shows the territorial enclaves of British Walfish Bay in German Southwest Africa,...

Map of Central and Western Europe after the Treaty of Versailles at the end of WWI. The map includes railroads, canals, shipping routes, major cities and capitals, and the country boundaries established by the Treaties of Versailles,...

Map of Central and Western Europe after the Treaty of Versailles at the end of WWI. The map includes railroads, canals, shipping routes, major cities and capitals, and the country boundaries established by the Treaties of Versailles,...

A map of the "barred zones" and "safety lanes" outlined in Germany's 1917 note to the United States regarding neutral shipping to and from Europe.

Map of Central and Western Europe after the Treaty of Versailles at the end of WWI. The map includes railroads, canals, major cities and capitals, and the country boundaries established by the Treaties of Versailles, proposed boundaries...

Map of Central and Western Europe after the Treaty of Versailles at the end of WWI. The map includes railroads, canals, shipping routes, major cities and capitals, and the country boundaries established by the Treaties of Versailles,...

A map showing the division of Europe as to War with England, 1778 to 1782, including neutral countries, countries hostile to England's Maritime Code, and open enemies of England.

A map of France at the time of the death of Charles V in 1380. This map is color-coded to show the territory of France at the time, the possessions of the House of Burgundy (Artois, Flanders, Rethel, Duchy of Burgundy, and...

A map of France during the second English invasion during the Hundred Years' War, between the Battle of Agincourt (1415) and the Battle of Castillon (1453). The map is color-coded to show the French and English territories in 1422, the...

A map of the Western Front showing the retirement of German forces after the armistice, the final battle line of the allied Hundred Days Offensive, the territories of Lorraine and Alsace to be restored to France, the neutral zone to the...

A map of Greece and Asia Minor at the time of the wars with Persia (Greco-Persian Wars, 499-479 BC). The map is color-coded to show the extent of the Ionian Revolt (499-493 BC) from Macedonia along the coast of Asia Minor to the island...

Pipestone National Monument preserves traditional catlinite quarries just north of Pipestone, Minnesota. The catlinite, or "pipestone", was and is used to make peace pipes, vitally important to traditional Plains Indian culture. The...

Felix Kirk Zollicoffer (May 19, 1812 - January 19, 1862) was a newspaperman, three-term United States Congressman from Tennessee, officer in the United States Army, and a Confederate brigadier general during the American Civil War. He...

Swedish king who fought to keep Sweden neutral during World War I.

Rear Admiral Winslow, born in Wilmington, N. C., November 19th, 1811, died in Boston, Mass., September 29th, 1873. He entered the navy as a midshipman, February 1st, 1827, and was made a lieutenant, February 9th, 1839. He was...