Lesson
Time |
Engaging the Student (Entry Task) |
Developing the Ideas--Lesson |
Checking for Understanding (exit ticket) |
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Student Handout |
Teacher/Lesson Notes |
Materials | |||
~2 class periods |
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View the full lesson here:
Lesson 5-3 Conducting a Bioassay
If time allows, show students the following PowerPoint that describes their test organism, Daphnia magna, and why it is commonly used in Bioassay studies. NOTE: It's extremely important that students use the smallest daphnids possible as they do asexually reproduce!
NOTE: The Reference Toxicant tests are more challenging, so you may want to assign students that are particularly good at following directions and attention to detail to the Reftox test. Often, students do not know how to properly measure volume with a syringe, so it's good to do a small tutorial with the Reftox groups (using the student handout provided) and have them draw out how they'll measure their quantity before they actually do it for the lab. Also, they need to be very careful when moving their test that the water doesn't slosh into the other test chambers. It only takes a little copper to kill the Daphnia. |
For Class to Share:
For each group conducting an "Effluent Test":
For each group conducting a "RefTox Test":
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Check for understanding with Page 5 of Bioassay Lab Student handout. |