Three Magnetic Chemical Elements: Iron, Cobalt, Nickel

The three familiar magnetic chemical elements are iron, cobalt, and nickel. Each can be strongly attracted to a magnet and can become magnetized, although its magnetic behavior depends on temperature, structure, and the material’s surroundings. What “magnetic element” means In everyday conversation, calling an element magnetic usually means that a piece of it is attracted

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Cottontails: Three Factors That Limit Their Numbers

Three major factors limit cottontail populations: predation, harsh weather and habitat loss or degradation. Food shortages and disease can also matter, but the effects of these pressures depend on the species, season and local landscape. What “limiting factors” means A limiting factor is anything that restricts population growth, survival or reproduction. It may reduce the

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