If you drop a ball from several different heights and note how high it bounces from each height what is the bounce height? a) dependent variable b) constant variable c) control variable d) independent variable

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.