1
A steep slope connecting a continental shelf and abyssal plain.
2
Underwater depression
3
Formed by all of the water masses on Earth
4
A sunken area caused by part of the Earth's crust collapsing
5
Underwater range
6
All living beings that inhabit the Earth
7
Very high terrain, with sharp slopes and an altitude of at least 600 metres
8
An elevated plain that is more than 200 metres high
9
An elongated depression carved out by a river
10
An extensive area that is flat, or gently rolling, at least 200 metres high
