Quiz2Know

Geography

World Land Borders and Frontiers

Challenge your understanding of international boundaries, border lengths, enclaves, and shared frontiers.

This is a free, 8-question multiple-choice quiz. Answer each question to see whether you got it right, with an explanation for every answer. There is no sign-up and no time limit — take it as many times as you like, and scroll down for the full answer key once you are done.

Question 1 of 8

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Which two nations share the longest continuous land border in the world?

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Answer key & explanations

Every question in this quiz, with the correct answer marked and an explanation of why it is right. Use it to revise before or after taking the quiz above.

  1. 1.Which two nations share the longest continuous land border in the world?

    • ARussia and Kazakhstan
    • BUnited States and Canada✓ Correct
    • CChina and Mongolia
    • DArgentina and Chile

    Correct answer: United States and Canada

    The international border between Canada and the United States measures approximately 8,891 kilometers, making it the world's longest land frontier.

  2. 2.Which country shares a land border with the greatest number of neighboring nations?

    • AChina✓ Correct
    • BBrazil
    • CGermany
    • DIndia

    Correct answer: China

    China shares land borders with 14 recognized sovereign states, tying with Russia for the highest number of neighbors worldwide.

  3. 3.Which European country is completely encircled by Italy and forms an enclave?

    • ALiechtenstein
    • BAndorra
    • CSan Marino✓ Correct
    • DMonaco

    Correct answer: San Marino

    San Marino is an entirely landlocked enclave surrounded entirely by the territory of Italy; Vatican City is the only other enclave inside Italy.

  4. 4.What is the only country that shares an overland border with the United Kingdom?

    • AFrance
    • BRepublic of Ireland✓ Correct
    • CBelgium
    • DNorway

    Correct answer: Republic of Ireland

    The United Kingdom shares a 499-kilometer land border with the Republic of Ireland on the island of Ireland, separating it from Northern Ireland.

  5. 5.Which country borders both the Atlantic Ocean and the Mediterranean Sea while sharing a border with France?

    • APortugal
    • BItaly
    • CSpain✓ Correct
    • DSwitzerland

    Correct answer: Spain

    Spain shares a long mountain border with France across the Pyrenees and features extensive coastlines along both the Atlantic Ocean and the Mediterranean Sea.

  6. 6.The border between Spain and Portugal is historically known by which name?

    • AThe March
    • BLa Raya (A Raia)✓ Correct
    • CThe Iberian Line
    • DThe Lusitanian Divide

    Correct answer: La Raya (A Raia)

    Known as 'La Raya' in Spanish and 'A Raia' in Portuguese, it is one of the oldest and most enduring fixed borders in Europe, defined largely in 1297.

  7. 7.Which South American nation shares a land border with every South American country except Chile and Ecuador?

    • AArgentina
    • BColombia
    • CPeru
    • DBrazil✓ Correct

    Correct answer: Brazil

    Brazil shares land borders with ten different nations, touching every sovereign country on the South American mainland except Chile and Ecuador.

  8. 8.Which pair of countries shares the shortest non-island land border in the European Union?

    • AFrance and Monaco
    • BSpain and Gibraltar
    • CItaly and Vatican City
    • DSpain and Morocco (Peñón de Vélez de la Gomera)✓ Correct

    Correct answer: Spain and Morocco (Peñón de Vélez de la Gomera)

    The Spanish sovereign territory of Peñón de Vélez de la Gomera borders Morocco along a sandy spit measuring just about 85 meters, the shortest international border segment.

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