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Like many transition metal complexes, copper (II) sulfate pentahydrate is brightly colored; crystals of this beautiful substance are a pale shade of blue. Its color stems from the chemistry and physics of its composition — or, more specifically, the kind…
The giraffe is the tallest of all the mammals with a neck that is more than six feet long. The giraffe’s height gives it advantages such as reaching leaves in trees or spotting predators that other animals cannot see. Making…
If your friend gave you one cup of solid ice, and another gave you one cup of liquid water, which one is heavier? Our instinct is sometimes to think that solids are heavier, but in fact liquid water denser than…
Popsicle sticks make a great material for creating DNA models. The shape of DNA is a double helix, which is like that of a twisted ladder. The outside of the helix is the DNA’s structural backbone, made of sugar and…
Aspen trees grow all over the world, in parts of North America, Europe, Asia, and Africa. The common American variety of aspen tree, Populus tremuloides, generally grows in high-altitude areas above 5,000 feet but also exists at sea level where…
Division of a number into another number isn’t always a clean operation, and a little bit can be left over. In division, one number, called the divisor, divides another number, called the dividend, to produce a quotient. The quotient can…
North Carolina is some 560 miles wide and is unusually diverse from a geographical and geological standpoint, which gives the “Tar Heel State” a variety of living and nonliving natural resources. This southeastern state includes three distinct landforms: a coastal…
An exothermic reaction gives off heat energy. Condensation is the process by which water vapor turns into liquid water. This typically occurs when water vapor molecules come into contact with cooler molecules. This causes the water vapor molecules to lose…
When materials like rocks and soil on the Earth’s surface wear down to sand and gravel or move from one location to another, erosion is the main culprit. Landforms, like canyons, often get their shape as a direct result of…
Northern Hemisphere dwellers, or most of the Earth’s population, have probably all noticed longer days and shorter nights in the summer and the opposite in winter. This phenomenon occurs because the Earth’s axis is not straight up and down at…
