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glacier – n. a very large area of ice that moves slowly down a slope or valley or over a wide area of land
peninsula – n. a piece of land that is almost entirely surrounded by water and is attached to a larger land area
deflate – v. to release air or gas from something, such as a tire or balloon, and make it smaller
altitude – n. the height of something above the level of the sea
habitat – n. the place or type of place where a plant or animal naturally or normally lives or grows
ecosystem – n. a biological community of interacting organisms and their physical environment
