Drag the words to complete the sentences.
Hello. I'm M. Jackson. I am a glaciologist. I study glaciers around the world. A glacier is a moving river of ice. It flows over Earth's surface.
A serac is a ridge of ice on a glacier. Seracs can be fun to climb. A crevasse is a crack in a glacier. I fell in a deep one, once. Luckily, my team fished me out of it!