activity

Fizzy drinks are fun to sip, but how do all of those bubbles get into your beverage? Learn the answer in this quick and bubbly science experiment!

safety
  • No safety considerations
difficulty
  • Beginner
time
  • 10 minutes

hey curious cook—

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Prepare Ingredients

3 cups (24 ounces)
plain seltzer, chilled
2
raisins or dried cranberries

Gather Equipment

2
tall, clear drinking glasses, both the same size and shape
1
marble or ball bearing
Spoon
1
 

Before you start, make a prediction: Which glass of seltzer do you think will have more bubbles, the one with the marble or the one with the raisin? Why do you think so?

 
2
 
3 cups (24 ounces)
plain seltzer, chilled

Fill both drinking glasses with cold seltzer until they are about ¾ full (be sure to fill both glasses to the same level).

 
3
 
1
raisin or dried cranberry

Place glasses side by side on counter. Hold marble about 1 inch above surface of seltzer in 1 glass. Hold raisin about 1 inch above surface of seltzer in second glass (make sure marble and raisin are at same height).

 
4
 

Let go of marble and raisin at same time, letting them drop into their respective glasses. Observe what happens for 30 seconds.

 
5
 
1
raisin or dried cranberry

Use spoon to retrieve marble and raisin from glasses. Repeat steps 3 and 4 with marble and second raisin. This time, observe what happens for at least 5 minutes. How do your results compare with your prediction from step 1?