| __ | 1. | alter | | A. | to fall down or cave in |
| __ | 2. | collapse | | B. | the condition of being wrecked; great damage or ruin |
| __ | 3. | crisis | | C. | very harsh or serious |
| __ | 4. | destruction | | D. | make different or change |
| __ | 5. | hazard | | E. | a time of great difficulty, difficult or dangerous situation |
| __ | 6. | severe | | F. | not easily foreseen or predicted;not able to tell beforehand |
| __ | 7. | substantial | | G. | source of danger, something that can cause harm or injury |
| __ | 8. | unpredictable | | H. | significant; of a great amount or size |