Page 24 - Demo

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HUMAN ACTIVITY & NATURAL HAZARDS, continued
Soil Sampling Bags, Pkg. of 100
Reclosable plastic bags imprinted with instructions for proper techniques of collect- ing and preparing soil samples. Bag size is 6" x 4". Comes in a package of 100.
AB1147 I $54.70
Soil Sampling Tube
This 12"-long galvanized steel sampling tube has a 1" core diameter. A cutaway side in the tube allows for examination of soil core sample prior to its removal. This is a professional quality implement that comes with detailed instructions and 20
soil sampling bags.
AB1148 I $35.65
Soil pH Meter
An easy-to-use meter for measuring the pH of soil to determine whether soil is suitable for particular plants or if the pH needs to be adjusted. Included foldout offers soil pH preferences of more than 400 plants along with instructions for accurate measurements as well as techniques and materials for adjusting soil pH. Includes meter, 4" probe and probe cable. Requires no batteries or external power.
FB0549 I $25.05
Water Pollution Chart
Water Treatment Activity Model
Build a model water treatment plant—right in your own classroom—with this hands-on activity! Graphically demonstrate the phys- ical, chemical and biological processes involved in water treatment as your class gets a firsthand view of water treatment and sewage remediation.
AP5312 I $249.80
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This chart is full of informative text and colorful drawings that provide answers to common questions about water pollution. A large center map details 47 water pollutants and methods for managing them. A table lists physical and chemical data, detailed diagrams show the aquatic food chain and the nitrogen and mercury cycles, and a map shows the prevalence of water pollution in the United States. Printed on durable, heavyweight paper. 28" x 221⁄2".
AP5216 I $10.90
FLINN SCIENTIFIC I HUMAN ACTIVITY & NATURAL HAZARDS