| Clue | Answer |
|---|---|
| narrow valley | GORGE |
| waterproofing substance | SEALANT |
| semi precious stone with streaked colouring | AGATE |
| semi precious stone with streaked coloring | AGATE |
| Hard stone | AGATE |
| taps hand | PATS |
| system that allows water to disperse | DRAINAGE |
| perceivable by sight | VISIBLE |
| can be seen | VISIBLE |
| Perceive by sight | VISIBLE |