Explains what an organic compound is, presents a list of the different classes of organic compounds, and discusses organic compounds in the human body. Also provides a list of other organic compounds including volatile and non-volatile...

Defines and explains what osmotic and hydrostatic pressure are, how to calculate them, their applications, and the instruments used to measure them.

Discusses the long history of the radio and the work of the many scientists who contributed to its invention.

A long list of famous chemists with biographical information and descriptions of their accomplishments.

A list of mathematicians with brief descriptions of their most important contributions.

Gives information about the lives and accomplishments of famous African-American mathematicians.

Gives brief information about the lives and accomplishments of famous women scientists from around the globe.

Gives information about the lives and accomplishments of ten famous scientists. Includes a list of other important scientists and their inventions.

A long list of scientists and their world-changing inventions.

A good explanation of basic quantum theory.

Explains what osmosis is and provides a variety of examples.

Clearly explains the characteristics of elastic and plastic deformation and the differences between them.

An interesting and detailed discussion of negative energy, how its existence has been proven, and its possible future application in making interstellar space travel possible.

Explains what a diode is and what its purpose is, and describes eight different kinds of diodes.

A short ebook (with some embedded ads) that explains how diodes work, some different types, and some applications of diodes.

A decent explanation of the concept of time as the fourth dimension. The author discusses Einstein's theory of special relativity and the idea of space-time.

Gives lots of examples of convection and instructions for a simple experiment that looks at convection currents in a fluid.

Explains and demonstrates how to calculate the percentage increase from year to year and how to calculate it using an Excel spreadsheet.

Demonstrates division of decimals by whole numbers and by decimal numbers.

Explains the characteristics of food chains and food web; the different levels of producers, consumers, and decomposers; and the differences between food chains and food webs. Includes charts and a Venn diagram comparing the two.

Describes the history of the invention of the atomic bomb, its use in World War II against Japan, the impact on people who were targetted by it, the immediate and long-term impact on generations of people, the effect on communications,...

Presents a map and a list of all the European countries, along with their capitals, land area, population, language, and currency.

An alphabetical list of all the European countries with short descriptions stating their capital, population, political system, currency, and languages spoken.

Describes examples of thermal energy in the natural world from the Sun, the oceans, and the Earth.