Chapter 4 Vocabulary North Africa and Southwest Asia Today oasis A green area in a desert fed by underground water terrorism the use of violent acts against civilians to achieve certain goals delta area formed from soil deposited by a river at its mouth silt Small particles of rich soil secular non-religious constitutional monarchy form of government where a king or queen is head of state, but elected officials run the government dictator all-powerful government leader aquifer underground rock layers that store large amounts of water mosque places of worship for followers of Islam embargo an order that restricts trade with another country Islamic Republic a government run by Muslim religious leaders Bedouin a nomadic Arab of the deserts of Southwest Asia moshav a cooperative settlement of individual farms in Israel where people share in farming, but also own some private property shah a title given to kings who ruled Iran wadi a dry riverbed filled with rainwater from rare downpours desalinization taking salt out of seawater alluvial plain an area built up by rich fertile soil left by river floods hajj a religious journey to Mecca that Muslims are expected to make at least once during their lifetime kibbutz settlement in Israel where people share property and produce goods