Beyond the answers - interesting background to this quiz

The mountain chain that divides two continents

The Caucasus Mountains form a natural frontier between Europe and Asia, stretching between the Black Sea and the Caspian Sea. The range includes Mount Elbrus, which is often cited as the highest peak in Europe depending on where one draws the continental boundary. This geographical dividing line has long been a subject of debate among geographers, but the Caucasus remains the most widely accepted marker in the region.

Why sodium is Na and not So

Sodium carries the symbol Na because of its Latin name, natrium. This reflects a broader pattern in chemistry, where several elements keep abbreviations derived from older or Latin terms rather than their modern English names. The symbol was standardised as chemical notation developed in the nineteenth century, helping scientists across different languages share a common system.

The liver's quiet position under the ribs

Most of the liver sits just beneath the right side of the rib cage, protected by the lower ribs. It is one of the largest organs in the body and performs hundreds of functions, including filtering blood and producing bile. Its sheltered location means many liver conditions can progress silently for a long time before causing noticeable discomfort.

Mars and its planet-wide dust storms

Mars experiences dust storms that can grow to cover enormous areas, sometimes blanketing the entire planet for weeks. These storms occur when sunlight heats the thin Martian atmosphere, lifting fine dust particles from the surface. Because the atmosphere is so thin, winds on Mars would feel much weaker than Earth winds, yet they are still capable of raising vast clouds of dust.