Earth

What was the nationality of the scientist who demonstrated a heliocentric system?

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What happens when hot and cold water meet?
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What does the Saffir-Simpson scale measure?
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Which type of eclipse occurs when the earth sits directly between the sun and the moon?
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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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Most minerals may be identified using the following methods except which?
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What does a konimeter measure?
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Confluence is the opposite of what?
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What is the area filled with groundwater called?
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