| 1 | 2 | Answer | % Correct |
|---|---|---|---|
| Central America | South America | Isthmus of Panama | 100%
|
| Mediterranean Sea | Red Sea | Isthmus of suez | 86%
|
| Andaman Sea | Gulf of Thailand | Kra Isthmus | 71%
|
| Peloponnese | Mainland | Isthmus of Corinth | 57%
|
| North America | Central America | Isthmus of Tehuantepec | 57%
|
| Tyrrhenian Sea | Ionian Sea | Isthmus of Catanzaro | 43%
|
| Gulf of Finland | Lake Ladoga | Karelian Isthmus | 43%
|
| Bird's Head | New Guinea («Bird's Body») | Bird's Neck Isthmus | 29%
|
| Nova Scotia | Mainland | Isthmus of Chigneto | 14%
|
| Crimea | Mainland | Isthmus of Perekop | 14%
|