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There are plenty of movies and TV stories where an intelligent dolphin “saves the day” for humans living along the waters. A dolphin may never rescue you, but these remarkable marine animals entertain people and help researchers learn more about…
A simple paper cup phone works by transmitting sound vibrations along a tightly-pulled string. The bottom of each cup serves as a combination “microphone” and “speaker,” picking up sound vibrations on one and and reproducing the sound at the other.…
“Mass” is a measure of how much matter an object has. “Weight” is a measure of the amount of force brought to bear on an object by gravitational attraction. Gravitational force changes based on location. For example, the gravitational force…
As the sun sinks low over the Serengeti, a group of female lions slink through the tall grass while stalking a herd of antelope. They hunt in the dark to stay cool, and they can eat up to 70 pounds…
In the physical sciences, some properties of mixtures relate to mole fraction, or mole percent, of one of the mixture’s components. The mole represents a quantity of substance, but relates to the number of atoms or molecules rather than mass…
A positive exponent tells you how many times to multiply the base number by itself. For example, the exponential term y3 is the same as y × y × y, or y multiplied by itself twice. Once you’ve grasped that…
Raccoons live in a wide range of habitats, and they are most recognizable for their black masks. They are predators and scavengers, and their grizzled gray, black or brown fur allows them to blend in with their environments. They are…
Temperate deciduous forest biomes go through four distinct seasons with hot summers and cold winters. They get moderate precipitation (on average 30-60 inches annually) that includes rain and snow; they’re found at midrange latitudes in places like the eastern United…
Tornadoes occur where unstable air creates wind funnels that destroy homes and uproot trees. This happens when updrafts of warm and wet air collide with cold air. Tornadoes primarily develop across the Great Plains in the United States in an…
Although Hawaii has favorable conditions for flamingoes – tropical climate and warm waters – no flamingo species are native to the Aloha State. Most flamingo’s in the Western Hemisphere live in South America and the Caribbean Islands. Other flamingo species…
