Page 190 - Demo

Environmental Science
Environmental Science—Pollution, continued
Effects of Chemical and Thermal
Pollution—Student Laboratory Kit
By: The Flinn Staff
The quality of our water sources is of great concern to us all. Students will see the effects of chemical and thermal pollution first-hand when they perform this intriguing experiment. Students introduce yeast to different environmental conditions to see how the yeast cultures are affected. Bromthymol blue is used to determine just how viable yeast cultures are under these various conditions. An excellent activity to show how chemical and thermal pollution can affect water quality and alter the life cycles of organisms! Includes Instructor’s Notes and reproducible student handouts.
Complete for 5 groups of students.
Why is the Water Green?—
Student Laboratory Kit
By: The Flinn Staff
Examine the effects of common pollutants on an organism that is abundant in all aquatic environments—algae! Simulated fertil- izer run-off containing nitrates and phosphates is added to locally collected algae-rich pond water or to purchased algae cultures. The amount of growth is compared against control samples with- out adding nutrients. Students also examine the algal cells using a microscope and record cell counts. After completion of this activity, students will understand how fertilizer run-off leads to algae blooms and why nitrate and phosphate pollution is an important environ- mental concern.
Complete 30 students working in pairs.
Clearing Water with Alum—
Demonstration Kit
By: Dale Moss
Carrick High School, Pittsburgh, PA
Ever wonder where your drinking water comes from and how it is purified? Demonstrate to your students the water purification process using this highly visible, commercially tested procedure. Dramatic demonstration shows rapid purification of water using an alum solu- tion. When alum solution is introduced to a water sample, sand and dirt particles coagulate and fall to the bottom of the water sample. A great demonstration to introduce your water quality unit. Kit includes exten- sive tips and extensions, a detailed background section, and enough materials to perform the demonstration seven times.
Concepts: Precipitation, water purification. Time Required: 25 minutes
Materials Provided: Alum, ammonia, sand.
Water Purification—
Student Laboratory Kit
By: The Flinn Staff
Illustrate a process commonly used by communities for the purification of water. Demonstrate the capacity of activated charcoal filtration for adsorption of objectionable odors and colors from water to improve its appearance and taste. Kit includes activated charcoal, filter paper, food colorings and detailed instructions. Required but not included: ring stands, funnels, beakers and mortar and pestle.
Complete for 30 students working in pairs.
1-800-452-1261
flinnsci.com
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Effects of Chemical and Thermal Pollution—Student Laboratory Kit AP7377
Catalog No.
Description
Price/Each
AP7377
Effects of Chemical and Thermal Pollution— Student Laboratory Kit
$68.10
Catalog No.
Description
Price/Each
FB1795
Why is the Water Green?—Student Laboratory Kit
$65.90
LM1046
Desmids, Mixed Species Green Algae
25.65
Why is the Water Green?—Student Laboratory Kit FB1795
Clearing Water with Alum—Demonstration Kit AP6210
Water Purification—Student Laboratory Kit AB1201
Catalog No.
Description
Price/Each
AP6210
Clearing Water with Alum—Demonstration Kit
$22.10
Catalog No.
Description
Price/Each
AB1201
Water Purification—Student Laboratory Kit
$34.70
ENVIRONMENTAL SCIENCE continued on next page.