CuW Commerce Tungsten is amazing for its strong physical attributes. A steel-gray metal, tungsten does not occur naturally in its pure metallic state; rather, it is found in several ores, including wolframite and scheelite.
From National Science Education Standards: Properties of Earth materials Introduction What does your breakfast cereal have in common with Earth's crust? They both have some of the same materials in them.
It might seem strange to compare a bowl of cornflakes to a pile of dirt.
But science can help us find one of the most common elements on Earth in your cereal: Even though iron only makes up less than 5 percent of the mass on Earth, it is found in a lot of places: It's also the most frequently used metal on the planet; it makes up most of steel, which is a mixture of iron and other ingredients.
Background If you have ever seen rocks or dirt that have a red or orange tint to them, they most likely contain iron; iron tends to rust when it is exposed to oxygen, causing that rusty red color on old metal objects—or rocks!
Iron also plays an important role in our bodies. It is found in a part of our blood called hemoglobin, which helps our blood to carry oxygen molecules from our lungs to the rest of our bodies. Our bodies can't produce iron, but it's naturally present in many foods, including meats beef, pork, turkeyproduce raisins, spinach, prunes and nuts walnuts, cashews, peanuts.
And it's so important for our bodies to have enough iron that some food makers put a dash of it in other food products—such as fortified breakfast cereal.
Of course it wouldn't be healthy to eat iron on its own, so stick to getting your daily dose via food and vitamins. Like many metals, iron is magnetic, so if you have a strong enough magnet, you will be able to pick it up. Will you be able to pick up your box of breakfast cereal just by magnetic force alone?
No, because it doesn't contain enough iron for the magnetism to overpower gravity pulling the weight of all that cereal down. But we are going to find a way to remove—or "extract"—the iron from that cereal and pick it up with a magnet. Are they pulled up by the magnet?
Keep crushing it until it becomes a fine powder the finer you can get it, the easier it will be to separate out the iron particles. Is the magnet picking up any black particles? Those are bits of iron! If you aren't collecting any, make sure your powder is fine enough and try running the magnet through it—otherwise, you might need a stronger magnet.
Compare your findings with the nutrition facts labels on the boxes. Read on for observations, results and more resources. Observations and results What happened when you ran the magnet over the whole cereal flakes? What happened when you passed the magnet over the crushed cereal powder?
How much iron were you able to extract from your cereal? Were you able to get more by dissolving the cereal powder in water? Check the nutrition facts label to see how much iron each serving actually contains keep in mind that this tabletop project might not be able to get all of the iron out of the cereal.
As it is in Earth's rocks and soil, the iron in your breakfast cereal is attached to the other substances around it. But when you crush the cereal down, it helps to free up the iron particles, so they can be picked up by the magnet dissolving the other parts of the cereal frees up the iron even more.
Share your iron extraction observations and results! Leave a comment below or share your photos and feedback on Scientific American's Facebook page.History and Uses: Francium was discovered by Marguerite Catherine Perey, a French chemist, in while analyzing actinium 's decay sequence.
Although considered a natural element, scientists estimate that there is no more than one ounce of francium in the earth's crust at one time. Possibly the word iron is derived from earlier words meaning "holy metal" because it was used to make the swords used in the Crusades..
Iron was known in prehistoric times. Genesis says that Tubal-Cain, seven generations from Adam, was "an instructor of every artificer in brass and iron.".
Iron is an element that has been known in its pure form for at least 5, years. The name "iron" comes from the Anglo-Saxon word "iron" and Scandinavian "iarn" for the metal. The element symbol for iron is Fe, which comes from the Latin word for iron, "ferrum". Iron is one of the most plentiful elements.
The History of Zinc - Long before the discovery of zinc as a metal, zinc ore was already being used to produce the copper-zinc alloy brass as well as zinc salts for medical purposes.
Although iron and lead were in use by the era of the ancient Romans, copper, bronze, and brass (an alloy of copper and zinc) were used by the Romans for coins, aspects of architecture such as doors, and some parts of their extensive plumbing system (although pipes were made of lead).
The environmental impacts of iron ore: pioneering a lifecycle analysis model The environmental impacts of our iron ore mining, as the very first step in steel production, are clearly important in understanding the sustainability profile of steel.