Crossword Puzzle Unit 10 VocabularyOnline version During unit 10, students learn new words, nouns and adjectives for geographical places, verbs and phrases related about dangerous places, etc. by Christian Marroquin 1 Very impressive, exciting, or surprising 2 The act of causing either water or air to be dirty. 3 4 involving a lot of risk 5 6 7 8 9 10 11 12 Tell someone that something bad may happen so they can avoid it. 12 2 3 8 1 4 10 5 11 7 6 9