A student did an experiment with two identical fish tanks, Tank 1 and Tank 2. About 20 ml water purifier was added to Tank 1 and
10 ml water punfier was added to tank 2. Tank 1 was heated to 88° F and Tank 2 was left at room temperature. The water purity of each tank was tested every day in particles per liter. The purity was recorded over a period of 5 weeks in the table shown below. Week Water Purity of Tank 1 Water Purity of Tank 2 12.6 12.6 13.7 13.9 14.3 14.4 15.7 15.8 17.6 17.6 Based on the table, which of these conclusions is correct?
a
Fish need 10 mL of water purifier to survive.
b
More purifier is needed to keep heated water clean.
с
Water purifier can help a fish survive longer.
d
Water purifier keeps fish tanks clearer for longer.
Fish need 10 ml of water purifier to survive because the data of 10 ml and 20 ml purifier is the same so it is recommended to use 10 ml purifier. First the data was same but by recording next week data, it shows slightly increase in the value of tank 2 while in the last week, both has the same value so we can concluded that by using 10 ml purifier is enough for the fish to survive.
