Key Concepts
•
We require water for drinking, cooking, cleaning, sanitation, firefighting,
landscape irrigation, agriculture, manufacturing, and other purposes.
•
We use power in some form or another every day: for heating and cooling,
lighting, cooking, electronics, transportation, and industrial processes.
•
The water we use, as well as the water that runs off of streets, becomes
wastewater. Most wastewater must be cleaned before it is safe to release
into the environment.
Standards Connections
Next Generation Science Standards
SCIENCE AND
ENGINEERING PRACTICES
SAMPLE STUDENT ENGAGEMENT, GRADES 3–5
Planning and Carrying
Record all the ways you use water and power during the school
day or within a 24-hour period, including while playing or sleeping.
Out Investigations
Consider how much water is used for household toilets, showers,
and faucets, and calculate the approximate amount of daily water
used at home. (New toilets use 1.28 gallons or less per flush,
while older toilets can use as much as 3.5 to 7 gallons per flush.
Standard showerheads use 2.5 gallons per minute, and a bathroom
faucet generally runs at 2 gallons per minute.) Brainstorm ways to
reduce water usage.
Using Mathematics and
Computational Thinking
BIG IDEAS
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Grades 3–5
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SAN FRANCISCO PUBLIC UTILITIES COMMISSION
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