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Many species of spider are generically referred to as “house spiders,” especially by homeowners who commonly encounter brown or gray arachnids scuttling about floor edges or ensconced in wispy ceiling-corner webs. If “house spider” is referencing spiders often entering homes,…
This experiment is designed to show how fluoride protects the calcium in eggshells against the softening effects of acid. Fluoridated toothpaste is used to coat part of an egg, which is then soaked in vinegar for several hours. The vinegar…
Organisms interact with each other and their environment in ecosystems. The role of consumers in an ecosystem is to obtain energy by feeding on other organisms and sometimes transfer energy to other consumers. Changes that affect consumers can impact other…
Natural bobcat habitat is decreasing, meaning that bobcats are gradually changing their range and location. In other words, you may find your neighborhood is now home to bobcats. The type of bobcat you see is largely identified by your location.…
Epsom salts dissolve slightly in rubbing alcohol but not to the extent they do in water. Some people apply Epsom salts and rubbing alcohol directly to their skin to relieve muscle aches, sprains and strains after taking part in sports.…
In genetics, crossing two organisms involves mating them and looking at the resulting progeny to better understand inheritance of a particular trait. Austrian monk Gregor Mendel, the father of modern genetics, formulated his laws of inheritance based on experiments in…
You may associate ammonium nitrate with explosives; it’s commonly used in safety explosives and pyrotechnics as well as fertilizer. But not all ammonium nitrate experiments end with a bang. When you add ammonium nitrate to water, you have a good…
In trigonometry, the law of sines is a formula that develops a relationship between a triangle’s angles and the lengths of its sides. As long as you know at least two sides and one angle, or two angles and one…
When you’re designing a heating system it’s often necessary to convert between the measurements commonly used with your energy source and the unit – typically British Thermal Units or heat units – used to measure your output heat. If you’re…
Fractional abundances relate to the proportion of various isotopes of a given element. Isotopes of an element are still the same element, although they may differ in weight because of a different number of neutrons. The abundance of these isotopes…
