10 most difficult science riddles A list of ten (out of 30) science related questions that are the most often answered incorrectly Science quiz The study of medicinal drugs derived from plants or other natural sources is called...Pharmacognosy. The American Society of Pharmacognosy defines pharmacognosy as "the study of the physical, chemical, biochemical and biological properties of drugs, drug substances or potential drugs or drug substances of natural origin as well as the search for new drugs from natural sources".very hard 18% pharmacologypharmacology18%phytologyphytology37%pharmacognosypharmacognosy18%phytopharmacyphytopharmacy25%Created by: Ninjai. Statistics based on 96 answers in 2 languages »medicine riddles » The study of the history, symbolism and usage of flags is called...Vexillology is the scientific study of the history, symbolism and usage of flags or, by extension, any interest in flags in general. A person who studies flags is a vexillologist, one who designs flags is a vexillographer, and the art of flag-designing is called vexillography.very hard 20% vexillologyvexillology20%heraldryheraldry23%phaleristicsphaleristics45%deltiologydeltiology11%Created by: Ninjai. Statistics based on 200 answers in 2 languages »words riddles » Where is The Encyclopaedia Britannica produced?Chicago. The Britannica is the oldest English-language encyclopaedia still being produced (currently only in the online version). It was first published between 1768 and 1771 in Edinburgh, Scotland. In 1901, after it was taken over by an American firm, the Britannica shortened and simplified articles to broaden its appeal in the North American market. Although publication has been based in the United States since 1901, the Britannica has largely maintained British spelling.very hard 23% LondonLondon12%OxfordOxford47%EdinburghEdinburgh17%ChicagoChicago23%Created by: globalquiz.org. Statistics based on 4120 answers in 5 languages »books riddles » Who was the first to create a zoo and botanical garden for scientific study?Aristotle. Throughout his conquests of Asia, Alexander the Great collected many plant and animal specimens for Aristotle’s research. This allowed Aristotle to develop in Athens the first zoo and botanical garden in existence.very hard 26% AristotleAristotle26%GalileoGalileo11%Carl LinnaeusCarl Linnaeus32%Charles DarwinCharles Darwin29%Created by: globalquiz.org. Statistics based on 4767 answers in 5 languages »ancient Greece riddles » What is deltiology?Hobby of collecting postcards. Officially the biggest collection postcards has got Mario Morby from Great Britain. Contains 1 000 265 pieces. It is officially record in Guinness Book of Records.very hard 26% Hobby of collecting postcardsHobby of collecting postcards26%Science of quantum equationsScience of quantum equations16%Science of winesScience of wines24%Field of medicine, about intestinesField of medicine, about intestines31%Created by: lukasz Poland. Statistics based on 722 answers in 2 languages »wines riddles » What effect does the botulinum toxin have on the neuromuscular junction?It prevents the release of the acetylcholine . Botulinum toxin is a neurotoxic protein that prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction and thus causes flaccid paralysis. Although it is the most acutely lethal toxin known, it is used commercially in medicine, cosmetics and research. very hard 27% it escalates the release of the acetylcholine it escalates the release of the acetylcholine 11%It prevents the release of the acetylcholine It prevents the release of the acetylcholine 27%it blocks the postsynaptic receptorsit blocks the postsynaptic receptors48%it escalates the function of the acetylcholinesteraseit escalates the function of the acetylcholinesterase11%Created by: Ninjai. Statistics based on 1607 answers in 2 languages »biology riddles » What was the name of the first and only Soviet space shuttle?Buran (Snowstorm or Blizzard) was the first spaceplane to be produced as part of the Soviet Buran programme. OK-1K1 completed one unmanned spaceflight in 1988, and was destroyed in 2002 It remains the only Soviet reusable spacecraft to be launched into space. very hard 28% UralUral19%BuranBuran28%GagarinGagarin21%BaikalBaikal31%Created by: Tschuka. Statistics based on 3244 answers in 2 languages »technical riddles » Which metal has the highest reflectivity and thermal conductivity?Silver is a chemical element with symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. very hard 28% GoldGold24%SilverSilver28%TinTin16%CopperCopper30%Created by: Tschuka. Statistics based on 2660 answers in 2 languages »metals riddles » What is the name of this butterfly species?Neopalpa donaldtrumpi. This butterfly species has been descoverd in 2017 by Canadian Vazrick Nazari. He called it this way because of similarity to Trump's hairstyle.very hard 29% Goldhair mothGoldhair moth31%Neopalpa donaldtrumpiNeopalpa donaldtrumpi29%Unsightly butterflyUnsightly butterfly16%Huskhead neopalda Huskhead neopalda 22%Created by: Alicja Turostowska. Statistics based on 3473 answers in 3 languages »presidents of the United States riddles » Which mathematician laid the foundations for abstract algebra (especially the group theory)?Évariste Galois was a French mathematician born in Bourg-la-Reine. While still in his teens, he was able to determine a necessary and sufficient condition for a polynomial to be solvable by radicals, thereby solving a problem standing for 350 years. His work laid the foundations for Galois theory and group theory, two major branches of abstract algebra, and the subfield of Galois connections. He died at age 20 from wounds suffered in a duel.very hard 30% Évariste GaloisÉvariste Galois30%Stefan BanachStefan Banach30%David HilbertDavid Hilbert22%Bertrand RussellBertrand Russell16%Created by: Ninjai. Statistics based on 1440 answers in 3 languages »mathematics riddles » Play science quiz and see all the questions.