Heighten your students' awareness of acid rain with this complete field study kit. Students collect rain samples and test the pH either out in the field or in the lab. Water samples from local streams, lakes, or ponds can also be tested for acidity. Analyze and compare results from different areas and discuss this environmental concern. Kit contains rain gauge with ground stakeholder for collecting rain samples, octet comparator device, pH indicator testing reagent, tubes, and a study guide with reproducible student activity masters. Enough reagents provided for 100 tests. Refill kit also contains reagents for 100 tests.