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  2. St Mary's Lighthouse - Wikipedia

    en.wikipedia.org/wiki/St_Mary's_Lighthouse

    Since 2012 St Mary's lighthouse has been grade II listed. [10] While it no longer functions as a working lighthouse, it is easily accessible (when the tide is out) and regularly open to visitors; in addition to the lighthouse itself there is a small museum, a visitor's centre, and a café.

  3. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns on which an accountant could record information or perform calculations. These are often called columnar pads, and typically green-tinted. In computing, spreadsheet software presents, on a computer monitor, a user interface that resembles one or more paper ...

  4. Refraction - Wikipedia

    en.wikipedia.org/wiki/Refraction

    Refraction. A ray of light being refracted in a plastic block. In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium. [1] Refraction of light is the most commonly observed phenomenon, but other waves such as sound ...

  5. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Historically, the concept of a proof and its associated mathematical rigour first appeared in Greek mathematics, most notably in Euclid's Elements. [4] Since its beginning, mathematics was primarily divided into geometry and arithmetic (the manipulation of natural numbers and fractions ), until the 16th and 17th centuries, when algebra [ a ...

  6. Cub Scouting (Boy Scouts of America) - Wikipedia

    en.wikipedia.org/wiki/Cub_Scouting_(Boy_Scouts...

    The Arrow of Light badge is the highest rank award available to Cub Scouts. To earn the Arrow of Light, the Cub Scout must complete six required adventures, two of 16 elective adventures, and child abuse prevention exercises. Earning the Arrow of Light allows a youth to join a Scout troop at ten years of age instead of eleven. [28]

  7. Fourth grade - Wikipedia

    en.wikipedia.org/wiki/Fourth_grade

    In India, where children enter Class 4 at the ages 9 to 10 it is called Lower Primary, it is known as the fourth grade. 5-7 standard categories as Upper Primary (UP) . Lower Primary gives the basic education necessary for a kid and when they get to the UP section , advanced knowledge will be provided via lessons or modules .

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