Self-study
A natural history museum contains several displays of wild animals. █████ ████████ ███ ███████ ██ ██████ ███ ████████ ██████ ██████ ██ ████ ██ ███ █████ █████████ ███ ████████ █████ ████ ███████ ██ ███████████ ███████ ██ ███ ████████ ███ ███ ████ ██ ███ ███████ ███ █████ ████████ ███ ███ ██ ████████ █████ ███ ███ █████ ████ ███ ███ ██ ███████ ███████████ █████ ████████ ███ ███ ██ ████████ █████ █████ ████ ███ ██ ████ █████ ██ ███ ████████ █████ ███ ████ █████
Summary
A natural history museum has several displays of wild animals that are made by drying and mounting animal skins. In some of the older displays, the skins have begun to wear out because of low humidity and the heat from the lamps. The older displays use tungsten lamps, but the newer ones use compact fluorescent lamps made for museums. These fluorescent lamps give off the same amount of light as the tungsten lamps but produce less heat.
Strongly Supported Conclusions
The tungsten lamps contribute to the deterioration of the older displays.
Some of the older displays will last longer if the tungsten lamps are replaced by the compact fluorescent lamps.
The animal skins in the newer displays will probably deteriorate more slowly than those in the older displays.
5.
The statements above, if true, ████ ████████ ███████ █████ ███ ██ ███ ██████████
a
Some of the █████ ████████ ████ ████ ██████ ██ ███ ████████ █████ ████ ██████████ ████ ███ ████████ ██ ███████ ███████████ ██████
Strongly supported. The older displays are deteriorating in part because of the heat of the tungsten lamps. Because the compact fluorescent lamps produce less heat than the tungsten lamps, the older displays would last longer if the tungsten lamps are replaced.
b
The displays that ███ ███ ██ ████ ███████ ███████████ █████ ███ ████ █████ ██ █████████████ ████ ███ ████████ ████ ███ ███ ██ █ ███ ████████ ██████
Unsupported. We know that the compact fluorescent lamps produce less heat than the tungsten lamps, but we do not know whether a display lit by many compact fluorescent lamps might be more prone to deterioration.
c
More of the ████████ ███ ███ ██ ███████ ███████████ █████ ████ ███ ███ ██ ████████ ██████
Unsupported. The stimulus gives us no information about how many displays are lit by each kind of lamp. We know only that “newer displays” are lit by compact fluorescent lamps and “older displays” are lit by tungsten lamps.
d
The newer displays ████ ███ ██ ███████ ██ █████████████ ███████ ██ ███ █████████
Unsupported. The stimulus tells us that low humidity contributes to deterioration, but it does not tell us whether the type of lamp affects humidity in any way. We know only that the lamps produce different amounts of heat.
e
The humidity in ███ ██████ ██ █████ █████ ████ ██ ███ ████ ███ █████ ████████ ████ █████ ███ ██ ██████
Unsupported. We know that low humidity contributes to deterioration, but we do not know anything about the museum’s humidity levels over time.