# 3Multiple ChoiceWhy does ice float on water?Ice is heavier than waterIce is denser than waterIce is less dense than water
# 8Multiple Choice먼지가 해가 진 후에도 완전히 어두워지지 않는 이유는 무엇인가요?먼지가 태양의 빛을 흡수한다먼지가 태양의 빛을 모든 방향으로 확산시킨다먼지가 빛을 차단한다
# 11Multiple ChoiceWhat was the main challenge Joe and Simon faced while descending the mountain?AvalancheSnow stormWild animals
# 12Multiple ChoiceWhat unfortunate event happened to Joe while descending the ice cliffs?He got lostHe broke his legHe ran out of supplies