Question

the passage below describes a process of scientific inquiry. select the part of the passage that describes revising the hypothesis. after a severe ice storm, ed wondered how he could melt ice on the sidewalk. he had heard that sand, when heated by the sun, could melt ice. so, ed got twenty ice cubes that were equal in weight. he sprinkled sand on half the ice cubes and left the other half unsanded. he placed all the cubes outside for one hour and then brushed off the sand and reweighed them. ed calculated the average weight of each type of cube to see if the sanded cubes melted more than the unsanded cubes. he decided that sand did not speed up melting, since the two types of ice cubes were similar weights. then, he read that salt makes ice melt at a cooler temperature. he predicted that because the melting temperature would be lowered, ice cubes would melt faster if he applied salt to them.

Explanation:

Ed first tested the idea of sand melting ice and found it didn't work. Then he read about salt and its effect on ice - melting temperature and made a new prediction. This new prediction is a revised hypothesis.

Answer:

Then, he read that salt makes ice melt at a cooler temperature. He predicted that because the melting temperature would be lowered, ice cubes would melt faster if he applied salt to them.