Non metal used to preserve food material

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

How are isotopes of the same chemical element alike? how are they different?

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.