Expert Physics & Chemistry Quiz: Schrödinger, Pauli, Quantum Levels
Expert physics and chemistry quiz: fermions and quantum states, Schrödinger's equation, mass conservation, electron energy levels and photon energy.
Institutions, presidents, elections
Politics looks at how societies govern themselves: types of regimes (republic, monarchy, democracy, dictatorship), the separation of powers, voting systems, parties, presidential and parliamentary elections, constitutions, and bodies such as the European Union and the United Nations. It also touches on political thought, from Montesquieu to Rousseau. The theme sticks to facts and institutions and takes no side.
If you want to revise the role of a parliament, a president or a constitutional court, or simply test your civic knowledge, you will find free quizzes here, playable on five levels from very easy to expert, each answer followed by an explanation.
Expert physics and chemistry quiz: fermions and quantum states, Schrödinger's equation, mass conservation, electron energy levels and photon energy.
A hard physics and chemistry quiz on quantum uncertainty, the Higgs particle found at CERN, entropy, the 1869 periodic table and the neutron. 10 questions.
Intermediate physics and chemistry quiz: the symbol Na, electrical energy units, the three laws of motion, a toxic combustion gas and the nucleus.
Easy physics and chemistry quiz on the speed of light, the Curies and radioactivity, atoms, heat-releasing reactions and the acidity scale. Free.
Very easy physics and chemistry quiz: the symbol for oxygen, water's boiling point, the apple and gravity, states of matter and Earth's pull. 10 questions.
It is the principle that legislative power (making laws), executive power (enforcing them) and judicial power (judging cases) are held by separate bodies, so that no one holds too much power. It was notably theorized by Montesquieu in The Spirit of the Laws, in 1748.
In a republic, the head of state is not hereditary and is elected, directly or indirectly, for a limited time. In a constitutional monarchy, the head of state is a monarch, usually hereditary, whose powers are limited by the constitution, and government is mostly carried out by ministers accountable to parliament.
In a majoritarian system, the candidate who comes first in a constituency wins the seat, sometimes after a second round. In a proportional system, seats are shared among parties in proportion to the votes they win. The first tends to produce clear majorities, the second a more faithful reflection of opinions.