While the invention of the telephone is usually attributed to Alexander Graham Bell, credit must also be given to others who were working on the concept around the same time. Read about the history of the telephone here. Includes a...

A sling psychrometer is used to measure humidity levels. Read about its history, how it works, its design, and how to use it. Includes a relative humidity table.

The field of archaeology has been specializations that investigate the past through many different lenses, e.g., environmental relationships, landscape study, and aerial investigation. This resource describes many of these specialties.

Compares paramagnetism to diamagnetism and lists the elements that are diamagnetic and paramagnetic.

Explains what magnetism and gravity are and the differences between them.

Discusses the continuing debate over who was the founder of calculus, Sir Isaac Newton or Gottfried Wilhelm von Leibniz.

Learn what sociology teaches us about different aspects of society and what the different sub-disciplines within sociology are.

Discover some of the deep questions that scientists and philosophers ask about time and some of the ideas that emerge from each one.

Learn what is meant by patriarchy, the characteristics of a patriarchal society, its history, about patriarchal societies in the world today, and some examples of patriarchy within families.

Explains what the differences are between matriarchy and patriarchy and the characteristics of each.

Describes the different disciplines within social sciences and the history of the term 'social science.'

Explains what the ecological systems theory is and it relates to child development. Looks at five environmental contexts that impact on a child's life and development. Provides examples of how different events within these frameworks...

Learn what deductive reasoning is and look at examples of how to apply it.

It is sometimes assumed that scientists do not believe in God but these famous scientists actually did. Read details about their lives and beliefs, and some quotes attributed to them.

Learn how pulleys work and their many uses in everyday life, industry, recreation, and other activities. Includes many pictures of pulleys and pulley systems.

Provides a detailed explanation of how the Venturi Effect works in fluid mechanics and how it can be proven using Bernoulli's equation. Also discusses applications of the Venturi Effect in the real world.

Learn about the different types of careers one can have as a scientist, whether you are interested in working with plants, animals, astronomy, computers, or microscopic organisms. The choices are limitless.

Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.

Provides brief descriptions and labeled illustrations for five different methods of surface mining.

Learn the characteristics of these two oceanic zones and of the plants and animals that live in them.

Pronouncing the name of this Icelandic volcano is definitely not easy! It became famous in 2010 when it erupted and spread volcanic ash over the whole of Europe, grounding air traffic. Learn some facts about this volcano, the events of...

Learn how the eyes play tricks on us when we look at optical illusions. This resource explains many of the techniques used to challenge our visual perception.

Gives the dictionary definitions for a lengthy list of science terms.

Explains what the golden ratio is and its relationship to the Fibonacci sequence. Gives interesting examples of the golden ratio in plants, seashells, astronomy, weather, the human body, insects, DNA, and animals.