Data Table 2A Baseline
Salinity
Sample
|
Initial Salinity
(ppt-S)
|
# of Salt Solution Drops Added
|
Final Salinity w/ Salt
Solution Added
(ppt-S)
|
Difference
(Final Salinity - Initial Salinity) (ppm-S)
|
Baseline
|
1.63
|
0
|
1.88
|
+0.25
|
1x
|
No
data
|
1
|
2.11
|
-
not available-
|
2X
|
1.62
|
2
|
1.99
|
+0.37
|
4X
|
1.90
|
4
|
2.25
|
+0.35
|
8X
|
1.48
|
8
|
1.85
|
+0.37
|
Lab 2A – Review Questions
1. What is electrical
conductivity?
2. Why do people measure
salinity of soil?
3. When the amount of salt
solution double (went from 1X to 2X or from 4X to 8X) what happened to the
salinity measurement in ppm-S?
Table 2B – Collected Soil
Sample Salinity
Sample
Number
|
Location around school
|
Salinity
(ppm-S)
|
1
|
Burlington
|
248
|
2
|
Prairie
|
246
|
3
|
Nancy’s House
|
227
|
4
|
Raised Bed
|
236
|
5
|
Edgardo’s House
|
201
|
6
|
Lincoln PK
|
291
|
7
|
Commercial
|
1.24 (ppt-S)
|
Lab 2B Review Questions
1. For
the collected soil samples what is the range measured salinity values?
2. Is
it possible to tell the salinity of a sample just by observing the physical characteristics
of the soil?
3. Explain
why you believe some samples had higher salinity levels than other samples.
You may do some online research to help you answer this question.
4. If
salinity levels were very similar from sample to sample, why do you think that is
the case?
Table 2C – Collected Water
Sample Salinity
Sample
Number
|
Location around school
|
Salinity
(ppm-S)
|
1
|
Pond
|
134
|
2
|
Tap
|
151
|
3
|
Lake
|
150
|
4
|
Puddle
|
118
|
5
|
Evian
|
189
|
Lab 2C Review Questions
1. For the collected water
samples what is the range measured salinity values?
2. Is it possible to tell the
salinity of a sample just by observing the physical characteristics of the
water?
3. Explain why you believe
some samples had higher salinity levels than other samples. You may do some
online research to help you answer this question.
4. If salinity levels were
very similar from sample to sample, why do you think that is the case?
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