Bubble Lab

Introduction: When we started this lab we had a few questions... 

• How bubbles are affected by salt
• How bubbles are affected by sugar  

• We knew that the cup with only the bubbles would work 

Hypothesis:

• We were guessing all three would work
• We also guessed that there would be no faults

Materials: 

• 3 plastic drinking cups
• liquid dish detergent/soap
• measuring cup and spoons
• water 
• table sugar
• table salt

Procedure:

1. Label three drinking cups 1, 2, and 3. Measure and add one teaspoon of liquid dish soap to each cup. Use the measuring cup to add two thirds of a cup of water to each drinking cup. Then swirl the cups to from a clear mixture CAUTION: Wipe up any spills immediately so that no one will slip and fall.
2. Add a half teaspoon of table sugar to cup 2 and a half teaspoon of table salt to cup. Swirl each cup for one minute.
3. Dip the drinking straw into cup 1, remove it, and blow gently into the straw to make the largest bubble you can. Practice making bubbles until you feel you have reasonable control over your bubble production. 
1. Repeat Step 3 with the mixtures in cups 2 and 3.

Data:

Discussion: 

       

 We found out that the salt did not blow any bubbles when the soap/water was individually taken out of the  cup with the straw but it would work when u had the straw in the cup and  just blew on it. In cup 2 with the sugar it worked the same with cup 1 the regular soap and water nothing added.

Conclusion:


Our hypothesis was rejected because the salt/soap mixture didn't work in cup 3. We tried to put salt and sugar in one of the cups the bubbles were made but they were weak and didn't stay very long.