Bubble-ology!

Which item will not easily blow bubbles?

• A straw
• A cup with the bottom removed
• A cup 
• A paper towel roll

What is in between the layers of the soap membrane in a bubble?

• Glycerin
• Water
• Soap
• Air

Soap molecules have two ends: one end is "hydrophilic" and the other end is "hydrophobic". 
Which end attaches to water? (Look at the picture!)

• The hydrophilic end attaches to water
• The hydrophobic end attaches to water

Soap bubbles happen because soap decreases what property of water?

• Air force
• Covalent bonding
• Surface tension

In the "Comparing Soap Bubbles" lab, what was the independent variable?

• The diameter of the soap bubbles
• The brand of soap
• The amount of glycerin
• The amount of water

In the "Comparing Bubble Solutions" lab, what was the dependent variable?

• The diameter of the bubbles
• The brand of soap
• The amount of glycerin
• The length of the straws

In the "Comparing Bubble Solutions" lab, what soap solution had the largest overall average diameter?

• Ajax
• Dawn
• Palmolive
• Pril

In " The Chemistry of Bigger Bubbles" what was the independent variable? (the thing we changed)

• The amount of glycerin in each bubble solution.
• The diameter of the bubbles.

In " The Chemistry of Bigger Bubbles", what was the dependent variable?

• The amount of glycerin in each bubble solution.
• The diameter of the bubbles

In " The Chemistry of Bigger Bubbles" what was one CONTROL? (kept the same for all trials)

• The amount of soap each kid used.
• The ratio of water to soap in the bubble solutions
• The amount of glycerine in each bubble solution.
• None. There was no control.