The problem: Answer a question about this article:
Earthworms are Oligochaetes that support terrestrial food chains both as prey and in some regions are important in aeration and enriching of soil. The burrowing of marine polychaetes, which may constitute up to a third of all species in near-shore environments, encourages the development of ecosystems by enabling water and oxygen to penetrate the sea floor. In addition to improving soil fertility, annelids serve humans as food and as bait. Scientists observe annelids to monitor the quality of marine and fresh water. Although blood-letting is no longer in favor with doctors, some leech species are regarded as endangered species because they have been over-harvested for this purpose in the last few centuries. Ragworms' jaws are now being studied by engineers as they offer an exceptional combination of lightness and strength.
How much of near-shore marine annelids are burrowing?
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The answer: up to a third


The problem: Answer a question about this article:
At the time of Australia's federation on 1 January 1901, Melbourne became the seat of government of the federation. The first federal parliament was convened on 9 May 1901 in the Royal Exhibition Building, subsequently moving to the Victorian Parliament House where it was located until 1927, when it was moved to Canberra. The Governor-General of Australia resided at Government House in Melbourne until 1930 and many major national institutions remained in Melbourne well into the twentieth century.
Where was the first federal parliament convened in 1901?
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The answer: Royal Exhibition Building


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The work of David Hilbert and Max Planck was crucial to the foundation of modern physics, which Werner Heisenberg and Erwin Schrödinger developed further. They were preceded by such key physicists as Hermann von Helmholtz, Joseph von Fraunhofer, and Gabriel Daniel Fahrenheit, among others. Wilhelm Conrad Röntgen discovered X-rays, an accomplishment that made him the first winner of the Nobel Prize in Physics in 1901. The Walhalla temple for "laudable and distinguished Germans", features a number of scientists, and is located east of Regensburg, in Bavaria.
Who discovered X-Rays?
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The answer: Wilhelm Conrad Röntgen


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By about 1910,[note 1] bound collections of empty sleeves with a paperboard or leather cover, similar to a photograph album, were sold as record albums that customers could use to store their records (the term "record album" was printed on some covers). These albums came in both 10-inch and 12-inch sizes. The covers of these bound books were wider and taller than the records inside, allowing the record album to be placed on a shelf upright, like a book, suspending the fragile records above the shelf and protecting them.
What was the purpose of record album covers?
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The answer:
protecting them