Beyond the answers - interesting background to this quiz

The ocean nation made of hundreds of islands

Micronesia is not a single island but a sprawling region of the western Pacific, and its name literally means "small islands". The Federated States of Micronesia, one of the countries in the region, is spread across a vast stretch of ocean while covering very little land. That contrast between enormous sea area and tiny landmass shapes much of life there, from fishing traditions to the way outer islands are governed.

When a moon looks like a planet

Titan, Saturn's largest moon, is bigger than the planet Mercury and is the only moon known to have a dense atmosphere. Its thick orange haze puzzled astronomers for years until probes revealed lakes and rivers - not of water, but of liquid methane and ethane. That makes Titan one of the few places in the solar system with weather, rain and seas, even if none of them would be friendly to us.

The painting that shocked Paris

Édouard Manet's "The Luncheon on the Grass" caused a scandal when it was shown in Paris in 1863, largely because of its casual nudity and the direct gaze of one of the figures. Rejected by the official Salon, it was displayed in the Salon des Refusés, the exhibition set up for works the establishment had turned down. Today it is regarded as a landmark in the shift from academic painting toward modern art.

A symbol that avoids confusion

Zirconium's chemical symbol, Zr, follows a pattern that trips people up: symbols often come from Latin or older names rather than the modern English word. Zirconium is a strong, corrosion-resistant metal used in nuclear reactors and in some ceramics, including certain types of jewellery. It is also chemically different from cubic zirconia, the synthetic gemstone often used as a diamond substitute.