the cooling curve of water

x
Biology 11
Ms. Zwart
06.09.13

The Cooling Curve of Water
Variables:
Independent Variable: The independent variable is heat; we measure the temperature with a thermometer, which has a systematic error of ± 0.5 °C.
Dependent Variable: The dependent variable is time; we know when 30seconds pass with the use of a stopwatch, which has a systematic error of ± 1 second.
Controlled Variables: The controlled variables used in this experiment are; a 400ml beaker with the systematic error of ± 50ml, 200ml tab water, Bunsen burner, a stopwatch with the systematic error of ± 1 second and a thermometer with the systematic error of
± 0.5 °C.

Temperatur
± .5°

Average
± .5°
Time ± 0.1min
Trial 1
Trial 2
Trial 3
Trial 4
Trial 5
Trial 6
Trial 7
Trial 8 0
86.5
84
80.5
92
88
89.5
92
90.5
87.9
0.5
86
83
80
91
87
89
91
89
87.0
1
85.5
85
75
91
86
89
90
89
86.3
1.5
85
84.5
74
88
86
88
90
88
85.4
2
84
84
72
88
85
86
89
86
84.3
2.5
82
82.5
70
86
85
85
89
85
83.1
3
81
81
68
85
85
83
85
83
81.4
3.5
80
80
66
84
84
80
85
80
79.9
4
79
79
64
82
84
80
84
80
79.0
4.5
78
77
63
80
83
79
82
79
77.6
5
77
76
61
78
83
77
81
77
76.3
5.5
76
75
60
77
82
76
80
76
75.3
6
75
74
58
76
81
75
73
75
73.4
6.5
74
72.5
57
75
70
74
72
74
71.1
7
73
72
56
74
68
73
75
73
70.5
7.5
72
71
55
73
67
71
74
71
69.3
8
71
70
54
72
67
70
73
70
68.4
8.5
70
69
52.5
71
68
69
72
69
67.6
9
69
68
51
70
66
68
71
68
66.4
9.5
68.5
67
50
69
65
67
70
67
65.4
10
67.5
66.5
49.5
67
64
66
69
66
64.4
10.5
67
66
48
66
62
65
68
65
63.4
11
66
64.5
47
66
61
64
65
64
62.2
11.5
65
64
46
65
60
63
65
63
61.4
12
64.5
63
45.5
64
60
63
64
63
60.9
12.5
64
62.5
45
64
59
62
62
62
60.1
13
63
62
44
63
58
61
61
61
59.1
13.5
62.5