physical sciences

Introduces the concepts of motion and balance to students in grades five through eight, providing a definition of motion, and discussing balancing forces, relative motion, Newton's three laws of motion, inertia, net force, and other topics. Includes experiments and reviews.

Introduces students in grades five through eight to key concepts in physics, focusing on friction, using visuals and experiments to discuss sliding, rolling, and fluid friction, lubricants, friction measurement, wind resistance, static friction, and friction use. Includes review segments.

Introduces students in grades five through eight to key concepts in physics, focusing on forces, using visuals and experiments to discuss friction, gravity, electromagnetism, nuclear forces, Newton's laws of motion, and pressure.

Learn about the combination of elements: the difference between compounds and mixtures, naturally occurring and man-made. Includes hands-on activity.

Introduces students to key concepts in chemistry, focusing on atoms and molecules, using visuals and experiments to discuss the atom, electric charge, elements, the periodic table, chemical bonds, covalent bonding, ionic bonding, and phases of matter. Includes review segments.

Contains essays that provide an overview of twentieth-century science, discussing quantum physics, ideas having to do with complexity, efforts to understand human thinking and consciousness, and cosmology and high-energy physics; and includes more in-depth discussions of a number of related issues.

Explores changes in properties of matter, such as melting, freezing and vaporizing.