1pt which blood vessel carries waste-rich blood from the capillaries back to the healt? O A. vein
OB. neuron
O C. vena cava
OD. aorta

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.