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  2. Workbook - Wikipedia

    en.wikipedia.org/wiki/Workbook

    A workbook usually covers important concepts and tasks related to syllabus. Workbooks are used for solving extra problems and concepts which students have already studied from textbook. Workbooks are often used in schools for younger students, either in middle school or elementary school.

  3. Mining and metallurgy in medieval Europe - Wikipedia

    en.wikipedia.org/wiki/Mining_and_metallurgy_in...

    As mining gradually became a task for specialized craftsmen, miners moved in large groups and formed settlements close to mines, each with their own customs. They were always welcomed by regional authorities, as the latter were interested in increasing revenue through the profitable exploitation of the mineral-rich subsurface.

  4. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  5. Mining in ancient Rome - Wikipedia

    en.wikipedia.org/wiki/Mining_in_ancient_Rome

    Shaft sinking was the most dangerous and most difficult form of mining in ancient Rome. Due to its high cost, it was only used to collect the most valuable metals in Roman society. Due to its high cost, it was only used to collect the most valuable metals in Roman society.

  6. Mining - Wikipedia

    en.wikipedia.org/wiki/Mining

    Mining of sulfur from a deposit at the edge of Ijen's crater lake, Indonesia. Mining is the extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory.

  7. Mineral processing - Wikipedia

    en.wikipedia.org/wiki/Mineral_processing

    Crushing, a form of comminution, one of the unit operations of mineral processing. Mineral processing is the process of separating commercially valuable minerals from their ores in the field of extractive metallurgy. [1]

  8. Metallurgy during the Copper Age in Europe - Wikipedia

    en.wikipedia.org/wiki/Metallurgy_during_the...

    The theory that metallurgy was imported into Europe from the Near East has been practically ruled out. A second hypothesis, that there were two main points of origin of metallurgy in Europe, in southern Spain and in West Bulgaria, is also doubtful due to the existence of sites outside the centers of diffusion where metallurgy was known simultaneously with, or before, those in the ‘original ...

  9. Foxdale Mines - Wikipedia

    en.wikipedia.org/wiki/Foxdale_Mines

    The venture was an initial success with the result that a Canadian mining company, Amanda Mines Ltd, proposed a merger with Metalliferous Holdings Ltd. [11] An audit had found that approximately 400,000 tons of lead-zinc spoil was situated at the former pit heads at Laxey and Foxdale. [11]

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