This series introduces the core areas of chemical science, covering important concepts in an easy, accessible style. Each title contains a number of experiments and demonstrations, approached through the process of problem, hypothesis, experiment and conclusion. All the books support the QCA schemes of work and contain: definitions of important terms and explanations of key concepts; formulae and word equations; and the periodic table with explanatory notes. This title explores the concepts of the states of matter.

Includes the Aerial Warfare In Europe During World War II illustrations pack with over 180 maps, plans, and photos. Gen Henry H. “Hap.” Arnold, US Army Air Forces (AAF) Chief of Staff during World War II, maintained diaries for his several journeys to various meetings and conferences throughout the conflict. Volume 1 introduces Hap Arnold, the setting for five of his journeys, the diaries he kept, and evaluations of those journeys and their consequences. General Arnold’s travels brought him into strategy meetings and personal conversations with virtually all leaders of Allied forces as well as many AAF troops around the world. He recorded his impressions, feelings, and expectations in his diaries. Maj Gen John W. Huston, USAF, retired, has captured the essence of Henry H. Hap Arnold—the man, the officer, the AAF chief, and his mission. Volume 2 encompasses General Arnold’s final seven journeys and the diaries he kept therein.

Presenting a fascinating insider's view of U.S.A.F. special operations, this volume brings to life the critical contributions these forces have made to the exercise of air & space power. Focusing in particular on the period between the Korean War & the Indochina wars of 1950-1979, the accounts of numerous missions are profusely illustrated with photos & maps. Includes a discussion of AF operations in Europe during WWII, as well as profiles of Air Commandos who performed above & beyond the call of duty. Reflects on the need for financial & political support for restoration of the forces. Bibliography. Extensive photos & maps. Charts & tables.

Traces the usage of- and meaning given to- the terms "roles and missions" relating to the armed forces and particularly to the United States Air Force, from 1907 to the present.