Final answer:
The average depth of the ocean, at about 3.8 km with extremes reaching nearly 11 km, is greater than the average height of continents, which is approximately 0.84 km with the highest point being 8.85 km (Mt. Everest).
Step-by-step explanation:
Comparing the average height of the continents and the average depth of the ocean reveals that oceans are significantly deeper on average than the heights attained by continental landscapes. The average depth of the world's oceans is approximately 3.8 kilometers (km), with some areas like the Challenger Deep reaching down to around 10.9 km. In contrast, the average elevation for land is about 0.84 km, and even the highest point on Earth, Mt. Everest, reaches only 8.85 km above sea level. Hence, the average depth of the ocean is greater than the average height of the continents.