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19-1
Physical Features of Africa South of the Sahara
| Question | Answer |
|---|---|
| escarpment | steep cliff at the edge of a plateau with a lowland area below |
| rift valley | area of low relief flanked by highland regions that is formed by the moving apart of two of the Earth's tectonic plates |
| gorge | like canyon, a steep-sided valley formed when a river cuts through land that is being lifted upward |
| industrial diamond | diamond used to make drills saws, or grinding tools to process other materials rather than as a gemstone |
| series | arranged in an order and alike in some way |
| principal | main or primary |