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Leave a light on in warmer months and you’ll find that many insects fly at night. They range from tiny midges to lumbering beetles and large moths. Kinds of nocturnal insects vary according to where you live. For instance, deserts…
The common incandescent light bulb consists of several parts, some of which you can see, and a few you can’t. Thin glass forms the exterior of the bulb, called the globe. It contains the filament which gives off light, a…
When some substances dissolve in water, they break into their ions without reacting with the solvent. For example, sodium chloride breaks into sodium (Na+) and chloride (Cl-) ions that exist in aqueous form in the water. Other substances, such as…
The density of a chicken egg provides important information about the quality of the egg; the fresher and healthier the egg, the denser it is. To calculate density, you need to know the weight of the egg and its volume.…
Fossils, the remains of prehistoric organisms or other evidence of prehistoric life, tell you a great deal about what the world was like millions or even billions of years ago. Five different types of fossils are body fossils, molds and…
Wave Particle Dualities Light is a type of electromagnetic radiation visible to the human eye. It is made out of little packets called photons. Photons behave like particles in some ways and like waves in other ways. If you shine…
Converting cubic feet into pounds is not a direct calculation because cubic feet is a measure of volume and the pound is a measure of mass. A cubic foot of lead, for example, will weigh a lot more than a…
Chemistry terms can be confusing, in part because some terms have multiple related (but different) meanings depending on the branch of chemistry you’re dealing with. Take for example the word substrate in chemistry: It can refer to either a chemical…
Every science fair project can be broken into eight primary sections. When you present your project to a class or the judges of the science fair, you will need to ensure that each of the main eight elements is adequately…
Worms — bite people? Yes, and some can eat humans alive. Some kinds of worms will bite to eat; others sting with hairs to defend themselves. Some can live and move inside you. Based on such characteristics, some have even…
