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Birds are well-known migrators, their majestic flocks a delight to behold as they travel with the seasons. As the northern latitudes cool, many bird species across North America head for the tropics. Hummingbirds migrate to Florida, Mexico, and Central America,…
From the outside, geodes resemble common rocks, but when they are broken open they reveal a hollow cavity lined with a layer of agate and filled with crystals. Most geodes are hollow, although crystal growth can fill all of the…
Water appears to be the single most important environmental feature that allows the existence and maintenance of life. There are organisms that exist without sunlight or oxygen, but there have been none found as yet that exist completely independently of…
A limiting factor is any nutrient, resource, or interaction which puts an immediate limit on the growth of a population or individual. Non-living limiting factors, or abiotic limiting factors, include space, water, nutrients, temperature, climate and fire. Different populations within…
Learn the effect that temperature has on the process of diffusion to understand how to speed up the process and how to increase the rate of most chemical reactions. Diffusion is a process by which a concentrated group of molecules…
Pressure measures the amount of force pushing against something perpendicularly, such as the amount of force a gas applies to the inner wall of tires. Pressure is measured using a variety of units, including megapascals (MPa) and Newtons per square…
Technically, a mixed number like 2 and 3/4 already contains a whole number – in this case, 2. (Whole numbers are the numbers you learned to count with: zero, one, two, three and so on, and in a mixed number…
Red diesel fuels represent savings for farmers and landowners who utilize this fuel in tractors, farm and off-road equipment. Its color means it is not for on-road use, which saves money because it doesn’t have the same taxes associated with…
The mouth of a river is where it meets an ocean, a lake or another river. If a river carries a great deal of silt, gravel, clay and sediment as it travels, and this settles out at its mouth, that…
How easy it is to tell a male coyote from a female depends on how close you are to the animal. Coyotes are closely related to domestic dogs, like their cousins some physical and behavioral differences separate the genders. However,…
