Sea Level

Imagine trying to keep a consistent water level in a bathtub while people are constantly getting in and out. Just like the water level in the bathtub changes with every entrance and exit, sea level is the fluctuating average height of the ocean relative to the land, affected by factors like tides and climate change. The way you notice the water rise or fall with each movement in the tub mirrors how scientists measure and track the ocean's average height over time compared to the land.