In this activity NGSS (Next Generation Science Standards) aligned activity, students (Part 1:) design and carry out a study to calculate how much water will be saved if they turn the water off while brushing their teeth, and (Part 2:) design a and carry out a loner-term study at home to calculate how much water can be conserved. The lesson proceeds as follows:
1. First, students watch a short video on water conservation, and the growing water shortage crisis worldwide. They answer a few questions based upon the video.
2. Then, students design a simple study to calculate the amount of water that could be saved if they turn the water off while brushing their teeth. They carry out the procedure, and answer
conclusion questions.
3. Finally, there is option for students design a larger, more long term water conservation study
to be carried out at home, perform some calculations, and answer some conclusion
questions.
Time Frame: Part 1 should only take one class period. The optional second part is mostly done at home, and can be run over a weekend, or as long as a full week.
Details Below:
A. NEXT GENERATION SCIENCE STANDARDS HEREIN
DCI’s: ESS3: Earth and Human Activity, ETS1: Engineering Design
Cross Cutting Concepts: Cause and Effect, Scale Proportion and Quantity
Scientific and Engineering Practices:
Asking Questions and Defining Problems, Planning and Carrying Out Investigations, Designing solutions, Using Mathematical and Computational Thinking
B. SUGGESTED USES
Prior Knowledge: Students do not need to have any specific prior knowledge to complete this activity. However, they will be performing some simple math calculations.
Materials and Setup: For part 1, students will need access to a sink/faucet. They will need a bucket/container, a beaker, a stopwatch (phone or clock will work will work).
A couple of benefits of this activity are: (1) It can be used for most grades and (2) the teacher can just do part 1, or go further by having students do part 2 as well.
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