Oceans, Seas & Islands

From the vast Pacific to the tiny atolls of the Indian Ocean, our planet's waters and islands hold endless wonders. This quiz dives into nine questions about the largest ocean, the deepest trench, the biggest island, the saltiest seas, island nations, and the straits that connect these blue expanses. Did you know the Pacific Ocean covers more area than all land combined? Or that Greenland is technically an island, but Australia is considered a continent? You'll also explore the Philippine Sea—the largest sea on Earth—and the Great Barrier Reef, a living structure visible from space. Each question tests your grasp of physical geography, from ocean currents like the Gulf Stream to the narrow Strait of Gibraltar. Whether you're a trivia lover or a curious traveler, the mix of familiar and surprising facts keeps it engaging. At the end, you'll find out if you're a shallow-water beginner, a rising tide, or a master mariner. There are 10 multiple-choice questions with four options each, and your result category depends on how many you get right. No tricks, just solid geography—can you chart a perfect course?