Page 159 - Career Readiness Catalog

PROGRAM COMPONENTS
Individual components combine to form
a complete learning system.
• Student book that seamlessly integrates
investigations, labs, and readings into
the context of the issue’s storyline
• Equipment to carry out each embedded
activity for 5 classes of 32 students (in
groups of four, pairs or individuals)

• Online student and teacher
bookshelf portals

• Student Science Lab notebook

Materials needed for embedded labs and activities
are part of the Complete Equipment Package

JAFFREY CITY’S PROBLEM • ACTIVITY 5

Challenge Safety SCIENCE & GLOBAL ISSUES/BIOLOGY • SUSTAINABILITY
How can phosphate and nitrate indicators help identify the contamination problem
0 Wear safety eyewear
in Jaffrey Lake? and avoid skin contact 3. With your group, look at Student Sheet 5.1, “Jaffrey Lake Water Testing,” and
MATERIALS with the solutions. select three of the locations numbered 1–40 on the map to test first. Choose
locations you think will most likely contain high concentrations of the sub­
40 dropper bottles of Jaffrey Lake water (locations 1–40) stances. Record in your notebook why you predicted these locations.
FOR THE CLASS
FOR EACH GROUP OF FOUR STUDENTS 4. To begin the testing, take your Chemplate to the “lake area” and find the three
Chemplate ® in separate Chemplate cups and bring it back to your table. Record the location
bottles with the matching location numbers. Place 5 drops from each location
dropper numbers and the corresponding Chemplate cup numbers in your data table.
set colored pencils

FOR EACH PAIR OF STUDENTS 5. Test the three waters for your substance, as described in the testing procedure
12 phosphate- or nitrate-test strips below. Record the data in your table.
phosphate or nitrate color-comparison chart
testing procedure:
cup with rinse water a. Place the white paper on top of the paper towel.
paper towels b. Label the test strip with the location number.
white scrap paper
FOR EACH STUDENT c. Put one drop of location water on the end of the test strip.
Student Sheet 5.1, “Jaffrey Lake Water Testing”
d. For the phosphate test, compare the test strip to the color chart. For the
safety goggles e. Record the result in your table.
nitrate test, wait one minute before comparing.
Procedure dog f. Rinse out the dropper with water in the rinsing cup.
1. Of the 40 possible locations to test in the park Jaffrey 6. Using the results from your tests, begin to complete Student Sheet 5.1, “Jaffrey
lake, your group was paid to conduct 12
tests for each substance. Create a data table City of North wetlands East Side water the levels of each substance, and fill in the key using the scales shown on the
Lake Water Testing.” Choose different colored pencils to represent
in your science notebook where you will Jaffrey Park treatment color­comparison chart. Identify your map as either “nitrate” or “phos­
record the results of the tests. You will facility phate” concentrations, depending on the substance you are testing.
record the water location number, the East River 7. Share your data with the other pair in your group. As a group, choose three
Chemplate cup number, and the test results West New East additional locations to test that are based on the results.
River
for nitrate and phosphate.
car wash
Lake
2. In your group, decide which pair of stu­ main water Jaffrey housing 8. Repeat Steps 4–7 until you have tested 12 locations.
dents will test for nitrate and which will treatment 9. Compare maps and look for any patterns in the concentration levels and
facility
test for phosphate. shown below:
locations of the substances. Compare your data to the county standards
West industry
Side
Park Phosphate in Jaffrey Lake
South NATURAL CONCENTRATION (PPM) LOCAL LIMIT (PPM)
farmland Jaffrey 0.05 0.1
Nitrate in Jaffrey Lake
NATURAL CONCENTRATION (PPM)
LOCAL LIMIT (PPM)
27 2
10
3340 SEPUP SGI Sustainability Student Sheet 2/23/16 4:03 PM
Figure: 3340SustainSB 05_map Jaffrey L
Agenda MedCond 9/9 28
SGI Unit01 SB pp001-042 12-1-15.indd 27 SGI Unit01 SB pp001-042 12-1-15.indd 28
2/23/16 4:03 PM
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