Water and Light
Explorations with 1st Grade



Our dirty water goes down the drain.  

Guiding Question:

What happens to our dirty water after it goes down the drain?

Lesson Description

Everybody uses a sink, not everybody thinks about what happens to all the “stuff” we pour down it. Water and Light helps teach students all about what happens to their dirty water after it goes down the drain.

The Water and Light pilot is a 1 hour classroom lesson, including hands-on materials and science notebooks designed especially for young students to explore simple chemistry and light waves to examine what happens to the wastes we pour down the drain. The program will leave everyone with a deeper understanding of how we contribute to our collective wastewater system.


Aligned with 1st grade NGSS standards.

Waves: Light and Sound

K-2 Engineering Design

What Students Will Do:

Students will make their own dissolved salt solutions with simple supplies and easy to find containers. Using light and our science notebooks as a tools, students will think about what actually happens to all that stuff we put down the drain.

What Students Will Figure Out:

  • That light is a tool we can use to illuminate dissolved substances
  • That the stuff we put down the drain doesn’t really “disappear” when we put it in water

Want to learn more?

Please contact Ben Lavender at 925-335-7723 or blavender@centralsan.org to bring this exciting pilot program to your classroom!