1.
Mathematics: a segment of a circle.
3.
Biology: what is the vessel that carries oxygenated blood from the heart?
5.
Animals: 'felis domesticus' is better known as what?
6.
Moon: The Moon's surface is characterised by large, roughly circular, smooth-floored plains called what?
7.
Earth: One of the constituents of the Earth's core is nickel. What is the other one?
10.
Chemistry: abbreviation for Copper.
11.
Economics: japanese currency.
13.
Games: Japanese game played with black and white stones on a grid of 19x19 lines.
14.
Chemistry: abbreviation for Iron.
15.
Economics: Mexican unit of currency.
16.
Web Design: which markup language is specially designed to be extensible?
17.
Economics as a science was started by the Englishman Adam ----- with the publication in 1776 of his book, An Inquiry Into the Nature and Causes of the Wealth of Nations.
19.
Chemistry: an atom, group of atoms, or molecule that bears a positive electric charge as a result of electron loss or a negative charge as a result of electron gain.
20.
Geology: the longest division of time, encompassing two or more eras.
21.
Psychology: the personality component that mediates between the unconscious drives and external reality.
