Name__________________________________________________ Date ______________ Hour_____________ Tbl.______
"Surf and Turf"
1. Get 2 containers, one with soil and one with water. Put them side by side on your table.
2. Tie pieces of string to the holes in the ends of two thermometers. Tie the other end of the
strings to the ring on the ring stand so that both thermometers are positioned as described
below:
(a) one thermometer bulb 1/2 cm below the top of the water
(b) one thermometer bulb 1/2 cm below the top of the soil
3. Place your lamp so that it is 15-20 cm above the thermometers. The light should be the
same distance from both thermometers.
Don't turn the lamp on yet. Your set up should look like the drawing below.
4. In the chart on the next page, you will record the readings on both of the thermometers. In your group
give each person one specific thermometer to read.
5. Record the starting temperatures of both thermometers on the chart.
6. When the second hand on the clock gets to the 12:00 position, turn on the lamp. When the second hand
gets back to the 12:00 position record the temperatures in the chart below in the one minute section.
For the next nine minutes record the temperatures each time the second hand reaches the 12:00.
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Name__________________________________________________ Date ______________ Hour_____________ Tbl.______
Table 1
LIGHT ON
Time
Soil
Water
0 minutes
1 minute
2 minutes
3 minutes
4 minutes
5 minutes
6 minutes
7 minutes
8 minutes
9 minutes
10 minutes
7. After the 10 minutes have passed turn off the lamp. Keep recording both of the temperatures
with the light off for another 10 minutes. The initial recording on this chart will be the same
as the 10 minute reading on Table 1. Simply copy the reading onto Table 2 and continue
timing.
Table 2
LIGHT OFF
Time
Soil
Water
0 minutes
1 minute
2 minutes
3 minutes
4 minutes
5 minutes
6 minutes
7 minutes
8 minutes
9 minutes
10 minutes
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Name__________________________________________________ Date ______________ Hour_____________ Tbl.______
8. Record how much the temperature changed for each thermometer. For the "Light On" data subtract
the starting temperature from the ten minute reading for both soil and water thermometers.
Table 3
Temperature Change With the Light On
Soil
Water
Temp. 0
Minutes
Temp. at 10
Minutes
Change in
Temperature
9. Record how much the temperature changed for each thermometer. For the "Light Off" data,
subtract the starting temperature for each thermometer from the ten minute reading.
Table 4
Temperature Change With the Light Off
Soil
Water
Temp. 0
Minutes
Temp. at 10
Minutes
Change in
Temperature
10. Make line graphs your data from Table 1 and 2.
On the first graph, use the data from Table 1. Label the Y axis Temperature in Degrees Celsius, and
the X axis Time in Minutes. Be sure to give this graph a title. Make 2 lines on this graph, one for soil
and one for water. Be sure to label each line. (You may want to use a separate color for each line.)
On the second graph use the data from Table 2. Label your axis the same as in the first graph. Be sure
to give this graph a title. Again, make 2 lines on this graph, one for soil and one for water. Be sure to
label each line.
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Name__________________________________________________ Date ______________ Hour_____________ Tbl.______
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