What are some ways that groundwater is used in the united states currently?

One does not belong why? ice, gold ,wood ,diamond and table salt

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6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.