PLEASE HELP How does knowing how a star forms help an astronomer study the origins of the universe? *

In a floral arrangement, the focal area is often

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.

Air can be considered a mixture. which statement does not explain why?