문제 3선택형Why does ice float on water?Ice is heavier than waterIce is denser than waterIce is less dense than water
문제 11선택형What was the main challenge Joe and Simon faced while descending the mountain?AvalancheSnow stormWild animals
문제 12선택형What unfortunate event happened to Joe while descending the ice cliffs?He got lostHe broke his legHe ran out of supplies