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A mole is a set amount of something, the way a dozen of anything means 12 whether you’re talking about a dozen eggs, donuts or months. In chemistry, whether you’re talking about the elements iron, sulfur or chromium, a mole…
The science world is filled with different ways to express the vital concept of concentration, which is the amount of something present per unit volume. This “amount” often has units of mass but can include virtually anything that can be…
Converting the example equation of 55 x 40 x 20 cm to inches is a simple task, requiring only two equations. To convert from measurements in centimeters to inches, use the conversion formula, which is the value in centimeters multiplied…
The number of possible titles for Science fair exhibits are as varied as the many projects in a science fair. A title should catch the eye of the judges, pique their interest in the experiment or model and draw them…
Although we live in, move through and see a world of three dimensions, most of the representations of that world are two dimensional. We view drawings or photographs on flat paper or computer screens. Even our 3-D visual observation of…
Ecosystems are made up of a variety of living organisms as well as nonliving factors such as water, sunlight and rock. Animals play essential roles in the formation and maintenance of the ecosystems they live in. For example, one ecological…
Numerous schemes exist for dividing Earth’s vast land area into helpful categories that combine geography with political considerations. While seven distinct continents exist, one of them, Antarctica, is uninhabited save for research stations and is not included in most formal…
In statistics, the letter “p” denotes the probability of a certain event occurring or a certain parameter being true for a certain population, but when a population is large, it may be impractical or impossible to measure it directly. As…
Deep in the ocean, the pressure is high and the temperatures are low. However, plants and animals can still thrive in those places that were once seen as impossible for sustaining life. Far fewer varieties of plants live in the…
A mostly undeserved reputation as dangerous to people and an occasional, somewhat overhyped taste for livestock has made the gray wolf one of the most feared and hated creatures on the planet. Human persecution has greatly reduced its North American…
