Reflection: Safety Testing for pH - Section 2: Guided Practice


Because students will be handling potentially dangerous materials during lessons involving chemical tests, a good deal of modeling, preteaching, and setting of expectations is required to ensure student safety. I provide all of my students with a science safety contract at the start of the school year and review this periodically to keep the safety rules fresh in the students' minds. I require that each students' parents also review and sign the science safety contract prior to any lessons involving lab work. I also start each lesson involving chemical testing with a demonstration so that each student understands the procedures for that specific test. I ensure that ample safety equipment (goggles, gloves, etc.) is present and accessible to students. Setting expectations for safe and responsible behavior allows me to feel confident that my students can safely engage in lab work in our classroom. 

  Safety: Providing Chemical Test Materials to Students
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Testing for pH

Unit 6: Watersheds and Water Quality
Lesson 5 of 10

Objective: SWBAT use a chemical test kit to determine the pH in a water sample.

Big Idea: pH is a key indicator of water quality as it determines whether the water can support life.

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Science, Human Impact on Earth, water, Environmental Education
  40 minutes
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