What is primary force that causes sea floor to spread and continents drift

What is the mass of 0.46 mil of mgcl2

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?

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.