Plains.
Elevation
A large area of level or nearly level land on Earth's surface is called a "plain." Plains can be found in various climates and can be formed through sediment deposition, erosion, or volcanic activity. They are often fertile and suitable for agriculture, making them important for human settlements.
The height above sea level at any point on Earth's surface is referred to as the elevation or altitude.
Earths core
elevation
For any point on Earth's surface, its height above sea level is called elevation or altitude. This measurement helps to determine the vertical distance between the point and the average sea level.
Earth's core
That I believe, would be the Earth's Crust.
Moon
30 feet above sea level and 50 feet above earths surface... science homework these days
Yes it is.
a plateu