Magnesium is almost always found in compound form in nature, with the most abundant source being ocean water. Normally, magnesium is found as magnesite, which is magnesium carbonate, or dolomite. In seawater, magnesium is the third most abundant mineral behind both sodium and chloride.Know More
Magnesium can also be found in some foods and is an important part of a healthy diet. Most humans do not get the amount of magnesium they need from food. The best natural source of magnesium in the diet is green leafy vegetables.
Outside of diet, magnesium is used in a number of applications. It is often combined with aluminum to make a strong metal alloy. Magnesium is a very light metal, the second lightest alkaline earth metal. The element normally forms ionic compounds, like magnesium hydroxide, which is more commonly known by the name milk of magnesia.
Another common household item that contains magnesium is Epsom salts. These are normally used as bath salts. The compound in the salts is officially called magnesium sulfate hepahydrate. This form of the element was discovered by a farmer in 1618 in Epsom, England. His cows refused to drink the water from a specific mineral well on his property, indicating that there was something abnormal in the water. Epsom salts are still used today to help with minor skin abrasions and irritations.Learn more about Earth Science
Glossopteris fossils are found throughout India, South America, southern Africa, Australia and Antarctica. They are a key piece of evidence for the theory of a southern supercontinent and continental drift. Assembling the continents of the southern hemisphere into a single land mass shows a linear, continuous distribution pattern of Glossopteris across continental boundaries. Edward Seuss was the geologist who theorized the existence of a southern supercontinent, which he called Gondwanaland.Full Answer >
Fossils are primarily found in sedimentary rocks because these rocks form at low temperatures and pressures. Igneous rocks form at temperatures and pressures that are high enough to destroy any organic remains. On rare occasions, fossils are found in metamorphic rocks, but they are deformed by the heat and pressure.Full Answer >
The answers to physical science questions can be found in textbooks, websites and from teachers. Because teachers rarely ask questions about material that has not been covered, textbook or class notes are the best place to start. However, if a review of class notes and textbooks fails to produce the desired answers, a trip to the library or an internet search is the next best option.Full Answer >
Aluminum can be found throughout the earth's crust, but it is most commonly extracted from bauxite ore. Because it is so soft in its pure form, most aluminum used for commercial purposes consists of alloys made from refined bauxite mixed with stronger materials.Full Answer >