this means that at average sea level, the elevation is zero. in reality, the level of the sea rises and falls in what are called tides. low tide is the point.who is drake?
The question is asking for the net change in the ocean's surface elevation, so we can ignore the parts of the question that mention his own elevation at the time of the measuring. We can see at 1, the elevation was 2.2, and at 7, the elevation was -2.4. The net change is the whole change over the period of time, so we just need to find the difference between the two. Adding them together gives you the distance from each elevation the sea's surface was, which is -4.6 ft as the elevation decreased
this means that at average sea level, the elevation is zero. in reality, the level of the sea rises and falls in what are called tides. low tide is the point.who is drake?