Both directions use the same worksheet. The shaded box in each answer is the letter to copy into the matching vault slot.
Name: ______________________ Date: ____________
Solve a clue and copy the shaded letter from your answer into the matching vault slot. Solve the clues in any order. Spaces don't count as letters. Open the vault with as few clues as you can. Solve a clue, copy its letter, and try the vault whenever you think you know the word.
| Vault slot | Clue | Answer | Take letter |
|---|---|---|---|
| 1 | An odorless very poisonous gas that is a product of incomplete combustion of ___ |
|
4th |
| 2 | Solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
|
6th |
| 3 | Undesirable state of the natural environment being contaminated with harmful substances as |
|
3rd |
| 4 | A heavy odorless colorless gas formed during respiration and by the decomposition of organic |
|
2nd |
| 5 | The phenomenon of ___ or gravel accumulating |
|
7th |
| 6 | An organic compound containing only carbon and ___ |
|
6th |
| 7 | A colorless toxic gas that occurs in the gases from volcanoes |
|
14th |