There are several ways to demonstrate that the Earth is round without relying on a globe. Here are a few simple methods:
Observing the curvature at sea: As you stand near the coastline or on a beach, you can observe ships appearing on the horizon. Initially, only the top parts of the ships, such as masts, will become visible, while the hulls remain hidden. As the ships approach, more of their bodies become visible. This phenomenon occurs because the Earth's surface is curved, and the ships are gradually coming into view as they rise above the horizon.
Watching the sunset or sunrise: When you observe a sunset or sunrise, you'll notice that the Sun appears to rise from or set behind the horizon. The curvature of the Earth causes the Sun's position to appear lower in the sky as it moves away, resulting in the visual effect of it disappearing below the horizon.
Traveling long distances: If you were to embark on a journey that covers long distances, such as flying in an airplane, you would notice that the flight paths are often curved. Pilots and navigators take into account the Earth's curvature when planning routes to ensure the most efficient and direct paths.
Viewing Earth from space: While this method doesn't involve a physical demonstration, satellite images and photographs taken from space clearly show the round shape of the Earth. These images have been captured by various space missions and satellites, providing comprehensive visual evidence of our planet's spherical nature.
It's worth noting that these methods are accessible and observable, but they may not be as precise as measurements made using advanced scientific instruments. Nonetheless, they offer practical and straightforward ways to understand that the Earth is indeed round.