Earth
What instrument measures altitude?
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What are the broken-off pieces of glaciers that make it to the open sea called?
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Where was the lowest world temperature, -128.6 degrees?
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What type of landscaping is used to help conserve moisture?
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What are mounds of sand that have been windblown called?
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Which of these islands is not considered a "hot spot", according to plate tectonic theory?
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What is the name of a glacier that is formed when two or more valley glaciers flow together?
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