| A | B |
|---|
| autonomous | it controls itself |
| canyon | deep valley that steep sides |
| glimpse | a very quick look |
| landform | a natural feature, such as a mountain, of a land's surface |
| landscape | you are looking at the area of land around you |
| prehistoric | very old, from a time before history was recorded |
| remotely | you control it from a distance |
| scenic | has beautiful scenery |
| submersible | it can go or work under water |
| summit | the top or highest point of a mountain |
| thrive | when living things grow well and are healthy |
| trench | long, narrow groove or ditch |
| vital | it is needed or very important |
