Question

12th grade post - assessment
the relevant text before the question: by continuing the back cover inscriptions and details from other studies, freeth and his ucl colleagues successfully created computer simulations and partial 3 - d model replicas of the device. these replicas were used to explore a hypothesis that the underlying front gears of the mechanism were used to track astronomical events. they referred to this as the “cosmos” display.
5 an x - ray ct scan of the front cover showed scientists that the front of the device was divided into sections for five different planets. the 3 - d imagery helped researchers learn and model how the device tracked the cycles of two of the planets: venus and saturn. this discovery allowed scientists to then piece together the remaining three planetary cycles. they placed the reconstructed gear drive that helped track the planetary cycles inside the small space between the front and back plates, creating a partial replica of the original device. the replica, once recreated, corroborated the purpose of the front of the device: to track astronomical events using five planetary cycles. this was difficult to understand before due to the fragmented state of the original device. ultimately, the ucl 2021 study helped match the user’s manual description on the back cover with the front display’s function. according to freeth in scientific american, the research team found that “inside the device a ‘main drive wheel’ turned all the gearing, which moved pointers and concentric rings displaying the positions of different celestial bodies.” for instance, the sun and moon — and the moon’s phases — were represented with small spheres, while the locations of various planets in the solar system were marked with colored beads.
assessment questions
question 32
how does the discussion of 3 - d imaging in paragraphs 4 - 5 contribute to the text?
a. it explains how scientists were able to restore the original mechanism with 3 - d imaging.
b. it helped scientists determine how the ancient greeks were able to construct the mechanism.
c. it describes how scientists tested a hypothesis about the mechanism using 3 - d image replicas.
d. it shows how scientists avoided damaging the mechanism further by sharing 3 - d image replicas with their peers.

Explanation:

To solve this, we analyze each option:

• Option A: The text says they created a partial replica, not restored the original mechanism, so A is wrong.
• Option B: The 3 - D imaging was about understanding the device's function (tracking planetary cycles), not how the ancient Greeks constructed it, so B is wrong.
• Option C: The 3 - D imagery helped researchers test the hypothesis (that the front gears track astronomical events) by creating replicas to learn about the planetary cycles and confirm the device's purpose, which matches.
• Option D: There's no mention of avoiding damage by sharing replicas, so D is wrong.

Answer:

C. It describes how scientists tested a hypothesis about the mechanism using 3-D image replicas.