Learn the power of chemical reaction between baking soda and vinegar. Gather Ziploc bag, baking soda, vinegar, paper towel, measuring cup and water for this challenge with YELL 2020 teen intern Chelsea.

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STEM Challenge Yo’Self | Teen Takeover is created by the San Francisco Public Library from the Youth Engaged in Library Leadership (YELL) STEM team. Stay STEM-tastic by reading, learning and experimenting at home. Gather materials for a new challenge posted at 3pm on weekdays throughout October. Visit www.sfpl.org/stemchallenge for more resources.