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The microscope counts as one of the more remarkable inventions in the scientific world. Not only has it helped satisfy a great deal of basic human curiosity about things that are too small to see with the unaided eye, but…
Students often benefit from scientific demonstrations because the visual evidence gives them another mode for remembering key concepts. This works especially well for intangible concepts like light and light travel. You can explain to students that light is actually made…
Transform boundaries represent the borders found in the fractured pieces of the Earth’s crust where one tectonic plate slides past another to create an earthquake fault zone. Linear valleys, small ponds, stream beds split in half, deep trenches, and scarps…
The term “limiting factors” refers to environmental stresses inherent in the ecology of a particular area that limit the procreation and expansion of some organisms. Some animals and plants may fare better than others under certain conditions, and some organisms…
In Chemistry, you will often have to perform analyses of solutions. A solution consists of at least one solute dissolving in a solvent. Molality represents the amount of solute in the solvent. As the molality changes, it affects the boiling…
Gold feels heavy, like a lead fishing weight, when you hold a placer nugget in the palm of your hand. However, weight alone is not enough to identify real gold in a rock. As an amateur, you can test a…
A helix is defined as a spiral that also has a linear dependence upon a third dimension. Found both within nature and within the man-made world, examples of helices include springs, coils and spiral staircases. The length of a helix…
A clay triangle is a piece of laboratory equipment used in the process of heating substances. It is used in conjunction with other lab equipment to create a stable framework in which to place a substance — usually a solid…
Structural members that experience axial tensile loads need to be sized so that they do not deform or fail under those loads. Stress is the relationship of force over a unit area, and it allows for the comparison of material…
Thanks to their intelligence, playful demeanor and uncanny ability to leap through the sea, dolphins are among the most popular ocean animals. However, there’s a key difference between them and their fish friends. Dolphins are mammals, which mean that they…
