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Mealworms (Tenebrio molitor) originally come from Africa but have become naturalized in other parts of the world, including North America. Wild mealworms are household pests as they often get into pantry food. However, throughout the world, live mealworms are well…
If you’ve ever made ice cream with an old-fashioned churn, you’ve seen freezing point depression — denoted Tf — in action. Freezing point depression is the addition of a solute to lower the freezing point of a solution. In the…
The easiest way to create a powerful magnetic field is by creating a powerful electromagnet. Electromagnets are used for everything from powering tiny electronic switches (called relays) to lifting huge pieces of scrap metal. The density of the winding, the…
The desert biomes of North America support a mixture of herbivores – animals that eat only plants. Herbivores in the desert include small mammals and large mammals, as well as some reptiles and birds. Their job of finding sufficient plant…
The grizzly bear is a subspecies of the brown bear (Ursus arctos). The grizzly bear life cycle begins with a baby bear that is a helpless furless ball but it can grow to become a feared and powerful predator, able…
Ecosystems, short for ecological systems, result from the interaction of biotic, abiotic and cultural components. Biotic and cultural components are all living things, nonhuman and human and including microscopic life, present in the ecosystem. Abiotic components are those nonliving things,…
A mutually exclusive event is one wherein two events cannot happen at the same time (e.g. getting heads and tails in a single coin toss), a mutually inclusive event allows both events to occur in a single trial (e.g. drawing…
Falcons, hawks, eagles and even owls look pretty similar at a glance. All of these birds share the same sharp, curved beaks and have exceptional eyesight and wickedly pointed talons on their feet. However, upon closer inspection falcons have several…
Rotation and revolution are terms that describe the angular motion of objects, that is, motion about a real or imaginary axis. They are often confused not only for this reason, but also because they often apply in different ways to…
In the United States and some other parts of the world, automobile speedometers provide speed in miles per hour. While this helps you keep track of your speed relative to a posted speed limit, this may not give you a…
