Don't Drink the BTB

Diagram provided by Benjah-bmm27

Today the 5th grade class I'm observing as research for my masters degree was AWESOME!!! Thank you Ms. McHale's students!

We did a hands-on experiment where they used Bromothymol Blue (BTB) to observe the amount of carbon dioxide (CO2) in water and how that level changed over time - a nice elodea plant was good enough to take in the CO2 and return O2 to the water.

Bromothymol Blue pH indicator dye in an acidic, neutral, and alkaline solution (left to right) provided by bfesser.

The kids are amazing. Super excited. All of them (with the exception of a few) stayed on target with the steps of the lab. It's awesome to be able to volunteer and help them out with the steps of the lab and offer advice and answer questions.


I can definitely see how and why science education gets the short end of the time stick. It takes dedication to want to set-up, execute and take down experiments. BUT, the enthusiasm and engagement of students demonstrates to me that science can succeed in the classroom. The right resources need to be provided to elementary teachers.

Thank you Wikipedia for the photos. Wikimedia Commons RULES!