1. BEFORE: What do you know about
ocean acidification?
B. AFTER:NOW What do you know about
C. What did you like best?
Intro video?
Facebook slide?
Blowing into bag?
Quick shell activity?
Nothing?
Other?
D. What would you still like to know or other questions that you have?

3. EARTH 2012 Wilmington, NC Summer of 2011 tide pooling Length: 0:20
Marina Sibling
EARTH 2012
Wilmington, NC
EARTH 2061
Summer of 2011 tide pooling
Length: 0:20

4. International—http://www. ocean-acidification. net/ NOAA—http://www
International— NOAA— USGS—

5. Ocean Acidification UNIVERSAL INDICATOR pH color red/orange orange
Work in groups of two.
Take a ziploc with water and a straw
Check the pH of your water (you can use pH paper too if you’d like)
Blow into the straw until you see a color change.
What pH is the water now?
What makes the pH change?
Place a shell/test fragment into the bag, any reaction?
Compare yours to the vinegar beaker.
UNIVERSAL INDICATOR
pH color
red/orange
orange
yellow
yellow/green
green
blue/green
blue/gray
violet