Karpelenia, Jenny

Explains the science of sound, discussing such concepts as waves, pitch, and frequency, and includes related experiments.

Presents a timeline of the earth's evolution and provides information on rocks and fossils and prehistoric time periods.

Learn about the lives of mollusks such as clams, slugs and octopuses from their body structure to their uses.

Learn about the lives of arthropods such as crickets, crabs and bees from their history and body characteristics to their life cycle.

Learn about cnidarians and worms from their characteristics and reproduction to diet and habitat.

Explains what mixtures and solutions are; describes solution strengths, different kinds of mixtures such as suspensions and alloys, and different ways mixtures can be separated, such as decanting and distillation; and includes instructions for several hands-on investigations.

Presents an introduction to chemical reactions, explaining the different components of chemicals, including elements and compounds, and describing the science of chemical bonds.

Presents an introduction to chemical energy, explaining the different sources of energy, how energy is stored, and how chemical energy is converted to other forms, including the concepts of heat, combustion, temperature, and enthalpy, and more.

Presents an introduction to the basic concepts of chemistry, in simple text with illustrations, providing information on atoms, molecules, the periodic table of elements, chemical bonding, compounds, synthetics, and more.

A scientific examination of acids and bases, discussing what they are and where they can be found, the properties and behaviors of acids and bases, solutions, and uses. Includes Internet connections and a glossary.