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