Latitude
longitude
41°n
105°w
43°n
85°w
39°n
120°w
30°n
98°w
45°n
93°w

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.