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When time is important – like planning for a science fair project – picking seeds that germinate quickly can be a key to success. Radishes push up through soil quickly, as do melon and squash plants. For flowers, choose zinnias…
Burning Styrofoam, or polystyrene, is the least appropriate way to get rid of it for both people and the environment. Research has shown that when Styrofoam is burned it releases toxic chemicals and smoke that can damage the nervous system…
Learning to deal with exponents forms an integral part of any math education, but thankfully the rules for multiplying and dividing them match the rules for non-fractional exponents. The first step to understanding how to deal with fractional exponents is…
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…
