| A | B |
|---|
| cartography | The skill of making maps |
| Cavalry | Mounted warriors |
| chemistry | The science dealing with the structure, composition, properties, and reactive characteristics of substances. |
| civilization | A society that has a high level of culture and social organization including organized government, job specialization, and a organized belief system. |
| Cold War | Non shooting conflict between the Soviet Union and their allies and the United States and their allies. Numerous secondary conflicts arise due to the Cold War. |
| Computer Revolution | During the 1980s personal computers began to appear in many homes across the world. By the late 1990s, computers had become a staple in most industrialized country’s homes. |
| cuneiform | One of the earliest forms of writing. It consisted of wedge shaped symbols usually imprinted in clay. Used throughout ancient Mesopotamia. |
| Curie, Marie | (1867-1934) French scientist. She is best known for his work with her husband Pierre in the field of radioactivity. |
| Curie, Pierre | (1859-1906) French scientist. He is best known for his work with his wife Marie in the field of radioactivity. |
| Da Vinci, Leonardo | (1452-1519) An Italian painter, sculptor, engineer, and inventor. Famous works include paintings Mona Lisa and The Last Supper. Also left a variety of sketches showing flying machines and underwater boats centuries before the invention of planes and submarines. |
| Daimler, Gottlieb | (1834-1900) German inventor. He is best know for his work in the development of the gasoline internal combustion engine. |
| deforestation | The widespread destruction of the world's forests. One of the largest areas of destruction are the tropical rainforests. These forest are cut down for the hardwood lumber, to clear space for farming, for building settlements, and for grazing animals. land bridge |
| dome | A hemispherical roof. |
| domesticate | To tame an animal to live with, or close to humans |
| dyke | A drainage ditch used to help control flooding. |
| Ebola | A contagious viral disease originating in Africa. It is transmitted by blood and body fluids and causes body organs and vessels to leak blood, usually resulting in death. |
| Edison, Thomas Alva | (1847-1931) American inventor. He is best know for the electric light bulb, the phonograph, and the motion picture camera. |
| Einstein, Albert | (1879-1955) American scientist best known for his theory of relativity. |
| engineer | A person who plans and creates mechanic structures for a variety of uses. |
| factory | A central location where goods are manufactured on a large scale. |
