Crossword Puzzle Ecosystems CrosswordOnline version Fill-in the crossword about ecosystems using the hints that are provided. You have 10 minutes to complete the activity. by Carolina Marin 1 Area inundated by shallow water where the land does not drain well 2 Flat land of high altitude, with rocky soil and poor vegetation 3 Land area that is populated by many trees 4 Any large region that gets very little rain each year 5 Huge body of salt water 6 Mountain covered with snow 6 2 4 5 3