Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. DECEMBER 2011 QUIZ ANSWERS 1. Needlelike rutiles are called “Venus hair” crystals. 2. Bundles of rutile fibers in minerals like corundum create the optical effect known as asterism. 3. Brilliant white powdered rutile is...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. NOVEMBER 2011 QUIZ ANSWERS 1. Chalcopyrite and pyrite both have the elements iron and sulfur in their chemical formulas. 2. Chalcopyrite crystals are tetrahedral (four-sided) in form. 3. Tarnished chalcopyrite has a colorful iridescent...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. OCTOBER 2011 QUIZ ANSWERS 1. The three traditional categories of meteorites are based on nickel-iron content. 2. Chemical signatures help scientists determine the origin of some meteorites. 3. Arkansas diamonds occur in a volcanic...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. SEPTEMBER 2011 QUIZ ANSWERS 1. Malachite is a hydrous copper carbonate because its chemical formula contains water. 2. Malachite and azurite form in an “oxidation zone” where cool, oxygen-rich water alters the copper. 3....
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. AUGUST 2011 QUIZ ANSWERS 1. The iron oxides hematite and goethite cement sand grains together into concretions. 2. Weathering releases the hard concretions from their sandstone matrix. 3. Hematite concretions on Mars are called...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. JULY 2011 QUIZ ANSWERS 1. Gold mixed with silver is called electrum. 2. At a half-ounce of gold per ton, how many pounds of rock are needed to produce a pound (16 ounces) of...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. MAY 2011 QUIZ ANSWERS 1. Weathering creates a black crust of manganese oxide on massive rhodochrosite. 2. Rhodochrosite crystals may occur as boxy rhombohedrons or pointy scalenohedrons . 3. A gangue mineral is considered...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. APRIL 2011 QUIZ ANSWERS 1. Crinoids are echinoderms belonging to the subphylum Pelmatozoa . 2. Crinoids use their arms to capture plankton from the ocean currents. 3. Some Mississippian limestone is made up almost...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. MARCH 2011 QUIZ ANSWERS 1. Azurite contains up to 55 percent copper. 2. Weathering can turn azurite into malachite. 3. Ground azurite has been used as a pigment. 4. A magnet’s field of force...
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Rock & Gem Kids is a monthly feature that offers articles, puzzles, and a quiz with prizes for junior rockhounds. FEBRUARY 2011 QUIZ ANSWERS 1. Kansas pop rocks are a type of pyrite specimen. 2. Pop rocks explode because the iron sulfides in them become unstable. 3. The nucleus of a pop rock is...
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