Question

the passage below describes a process of scientific inquiry. select the part of the passage that describes revising the hypothesis. hint: to revise the hypothesis, you use the results of the investigation to come up with a new explanation. an icy sidewalk 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:

The process of scientific inquiry involves using investigation results to form a new explanation for revising a hypothesis. Ed first tested sand's effect on ice - melting and found it didn't speed up melting. Then, based on his knowledge about salt lowering ice - melting temperature, he made a new prediction about salt's effect on ice - melting. This new prediction is his 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.