Question

the passage below describes a process of scientific inquiry. select the part of the passage that describes testing the hypothesis.
hint: to test the hypothesis, you use experiments or observations to collect data.
after walking by some rusted cars parked in the street, lindsey wondered whether all metals are equally susceptible to corrosion. lindsey could not recall ever seeing rusted aluminum objects, and she reasoned that aluminum must be less susceptible to corrosion than other metals, like iron. lindsey gathered some iron nails and aluminum foil. she prepared a saline solution by mixing salt into water. she then poured equal amounts of the solution into four separate cups. next, she placed an iron nail in two of the cups and a piece of aluminum foil in the other two. by the end of the week, lindsey noticed that the iron nails had rusted significantly, while the aluminum foil showed almost no signs of corrosion. she determined that iron is highly susceptible to corrosion in saline conditions, while aluminum is much more resistant.

Explanation:

Testing the hypothesis involves conducting experiments or making observations to collect data. In the passage, Lindsey gathered materials (iron nails and aluminum foil), prepared a saline solution, set up an experiment (placing iron nails in two cups and aluminum foil in the other two with equal amounts of saline solution), and then observed the results (iron nails rusted, aluminum foil showed no signs of corrosion). This entire experimental setup and observation process is the part where she is testing her hypothesis that aluminum is less susceptible to corrosion than iron.

Answer:

Lindsey gathered some iron nails and aluminum foil. She prepared a saline solution by mixing salt into water. She then poured equal amounts of the solution into four separate cups. Next, she placed an iron nail in two of the cups and a piece of aluminum foil in the other two. By the end of the week, Lindsey noticed that the iron nails had rusted significantly, while the aluminum foil showed almost no signs of corrosion.