Question

Use the following information to answer questions 1 and 2.

Kate had a Styrofoam cooler, a plastic cooler, and an insulated bag.
insulated bag
Styrofoam™ cooler plastic cooler
She wanted to know which container would keep drinks coolest for the longest period of
time. She chilled three identical glasses of water to 40°F. Then, she placed one of the glasses
in each container and closed the containers. During the next two hours, she opened each
container every
15 minutes and measured the temperature of the water. The results of her
experiment appear on the graph below.
Results of Kate's Experiment
Temperature (°F)
inio A All
64
62
60
58
56
54
52
50
48 awon as Isla
46
44
42
40
15
30
.............
5.2C; 5.2D; 5.2G; 5.5A (H)
tadion
T
di casas
1. Which of the following could Kate
blo Fabritodistam
conclude from her results?
e
TM
45
60
75
Time Elapsed (minutes)
A All of the carriers had equal
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Jaioa
B The water became warmer in each
ams of the containers.
C The Styrofoam cooler kept the
15qcq water coolest over two hours.
STA
D The insulated bag is the best
container for storing cool drinks.
Deplo22ib
90
105
omsins....
Styrofoam™ cooler
-
- plastic cooler
1516W insulated bag
boa gniled (A)
aldds 8
120
Insed oil O
bas? a
5.2E; 5.5A (H)
(3) 82.208.8

Answer 1

Answer: The Styrofoam cooler kept the water coolest over two hours.

Explanation: From the graph, it is clear that the temperature of the water in the Styrofoam cooler remained the lowest throughout the experiment, and hence, it can be concluded that the Styrofoam cooler kept the water coolest over two hours. The temperature of the water in the insulated bag and plastic cooler both increased more rapidly than in the Styrofoam cooler, indicating that they are not as effective at keeping drinks cool. Therefore, the answer is option C.