1. Happy Friday! Good luck Casteel Colts!
Grab a white packet off the computer cart
Write your name and QUIETLY WAIT for directions.

2. BTB – Bromythenol Blue
Is a chemical indicator that turns YELLOW when exposed to CO2

3. Problem
You want to set up a snail aquarium, but the directions require you to add an aqueous (water) plant called Elodea to your tank.
Because you are a curious Science Student, you want to set up an experiment to test why you would need both snails and elodea plants in your tank.
Elodea
Snail
Snail

4. Exploring the Lab

5. Setting up the experiment
BTB Only
Snails Only
BTB Only
Plants Only
BOTH
Snails Only
Plants Only
BOTH

6. Waiting 24 hours

7. Results BTB Only BTB Only Snails Only Snails Only Plants Only
BOTH
BOTH