| 1 | 2 | Answer | % Correct |
|---|---|---|---|
| Central America | South America | Isthmus of Panama | 100%
|
| Mediterranean Sea | Red Sea | Isthmus of suez | 78%
|
| Peloponnese | Mainland | Isthmus of Corinth | 56%
|
| Andaman Sea | Gulf of Thailand | Kra Isthmus | 56%
|
| North America | Central America | Isthmus of Tehuantepec | 44%
|
| Tyrrhenian Sea | Ionian Sea | Isthmus of Catanzaro | 33%
|
| Gulf of Finland | Lake Ladoga | Karelian Isthmus | 33%
|
| Bird's Head | New Guinea («Bird's Body») | Bird's Neck Isthmus | 22%
|
| Nova Scotia | Mainland | Isthmus of Chigneto | 11%
|
| Crimea | Mainland | Isthmus of Perekop | 11%
|