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- 1—White Dove School
Name: Nathan Alegría
Teacher: Carmen Zavala
Class: Science
Topic: Valuable Minerals - 2AluminumAluminum is a chemical element with the symbol Al and atomic number aluminum has a density lower than those of other common metals, at approximately one-third that of steel. It has a great affinity towards oxygen and forms a protective layer of oxide on the surface when exposed to air. Also, it is the most abundant metal in the earth´s crust.
- 3IronIron is a chemical element with the symbol Fe and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is by mass the most common element on Earth, right in front of oxygen, and used for making tools and weapons.
- 4CopperCopper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, sterling silver used in jewelry, cupronickel used to make marine hardware, coins, and electrical wiring.
- 5—Nickel is a chemical element with the symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Pure nickel, powdered to maximize the reactive surface area, shows a significant chemical activity, but larger pieces are slow to react with air under standard conditions because an oxide layer forms on the surface and prevents further corrosion.
- 6—Gold is a chemical element with the symbol Au and atomic number 79, making it one of the higher atomic number elements that occur naturally. In a pure form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal and a group 11 element.
- 7—Silver is a chemical element with the symbol Ag and atomic number 47. A soft, white, lustrous transition metal, exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes alongside gold.
- 8—Ruby is a pink to blood-red coloured gemstone, a variety of the mineral corundum. The rarest and most valuable rubies are a deep shade of crimson known as pigeon-blood red. The quality of a ruby is determined by its color, cut, and clarity, which, along with carat weight, affect its value.
- 9—Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium. It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.
- 10—Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium and/or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most of them come from mines in Colombia and Brazil.
- 11—Igneous Rocks a rock that forms when magma or lava cools. It can be divided into two groups instructive ( when magma cools down while still underground.) Extrusive rock (when magma reaches the surface as lava.)
- 12—Rocks that form when sediments are compacted and cemented together by great pressure, or when minerals form in. It can be divided into mechanical sediments and clastic sediment.
- 13—Rocks that have changed because of changes in temperature and pressure or the presence of hot, watery fluids (magma). It can be divided into Foliated rocks and Nofoliated rocks.
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- Estudiante Science FlashCards sobre Album, criado por Nathan Alegría em 16-04-2021.
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- Criado por Nathan Alegría · 16 abr 2021
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