Topic: Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis (HS-LS1-3). Adjust the settings, then copy the prompt.
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Planning notes for this lesson
Prerequisite skills to check: body systems interacting (MS-LS1-3); reading a line graph over time; independent, dependent and controlled variables in an investigation.
Key vocabulary: homeostasis, feedback mechanism, negative feedback, positive feedback, stimulus, response, set point, variable, control, data.
Warm-up idea: Have students take a resting heart rate, do 60 seconds of jumping jacks, then take it again each minute while resting. Ask: why does it come back down, and what would happen if it didn't?
Exit ticket idea: Students sketch a short investigation plan (question, variables, data to collect, number of trials) for one example such as heart rate after exercise or stomata and moisture, predict the data, and explain how a feedback mechanism keeps the condition within a range.
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Quiz on the same standard
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