Cobb, Allan B

Discusses security agencies, including their history, members, responsibilities, and role in the U.S. government.

Describes the properties of the different forms of matter and explains how each form of matter can be changed into the others.

"An introduction to matter, the elements of the periodic table, and atoms, electrons, reactions and bonding, and radioactivity."--Provided by publisher.

An introduction to the basics of nonmetals, covering Hydrogen, Carbon, Nitrogen, Oxygen, and other nonmetals.

Introduces the fundamentals of sound through hands-on experiments and activities.

Presents chemistry in action discussing chemicals used in industry, metals and metallurgy, chemistry in medicine and the environment and more.

Discusses the three states of matter and the steps that a material goes through when changing from one state to another.

Introduces properties of nonmetals, including carbon, hydrogen, and other gases.

Describes the dangerous work done by first responders--teams that include the police, fire department, emergency medical services, and ambulances, discussing the training needed to do the job, and looking at how rescue operations work.

Discusses the history and threats of biological and chemical weapons.