4.09 Cities back Understand /9 4.9.7 Word cards Back to deck Dangerous chemicals, waste in air and in water. pollution You hear it and it is too bad and too much. noise Part of the king's family. royal A fight between people from different countries. battle How high or low something. There are 3 levels here: A tall building has many levels. level All those people who live in a place. population A house for old, historical objects. museum No war, no fight, people live together happily. peace A line of standing people, who wait for something. queue Know well Not sure No clue Tutorial Spread the deck Delete × ← Previous Understand
