Colleen replicates an X-ray machine by covering an open shoebox with a screen and positioning a square cardboard piece in the center. She uses sand to simulate X-ray radiation, sprinkling it over the screen. Upon removing the screen, she observes an outline of the square cardboard. What does the cardboard symbolize in her simulation?

Question

options:

the areas that remain black on the X-ray
the areas that remain black on the X-ray

the person being scanned with X-rays
the person being scanned with X-rays

the bones that look white in an X-ray
the bones that look white in an X-ray

the veins that look white in an X-ray

Answer 1

In Colleen's simulation, the cardboard piece in the center of the shoebox represents the areas that remain black on the X-ray. The cardboard blocks the sand (simulating X-ray radiation), creating an outline that indicates where the radiation could not penetrate, similar to how certain materials block X-ray radiation in a real X-ray machine.