Surface Tension Experiment Quiz

What is the main topic of the experiment conducted in the video?

• The boiling point of water

• The surface tension of water

• The density of water

• The pH level of water

Which of the following materials is NOT required for the experiment?

• Dish soap

• A dropper

• A penny

• A thermometer

How many drops of water were initially able to fit on the dry penny?

• 25

• 17

• 30

• 10

What was the highest number of drops recorded on the penny during the repeated trials?

• 20

• 30

• 17

• 25

What was added to the water to change its properties in the experiment?

• Vinegar

• Soap

• Sugar

• Salt

How did the addition of soap affect the number of water drops on the penny?

• Made the water evaporate

• Increased the number of drops

• Decreased the number of drops

• Had no effect

What is the primary reason soap affects the surface tension of water?

• It changes the water's color

• It breaks the bonds between water molecules

• It increases the water's density

• It raises the water's temperature

What was observed when the penny was dipped in soapy water?

• The penny changed color

• The penny dissolved

• Fewer drops stayed on the penny

• More drops stayed on the penny

What concept does the experiment primarily demonstrate?

• Surface tension

• Sublimation

• Condensation

• Evaporation

What happens to water molecules when soap is added?

• They form stronger bonds

• They slide off surfaces more easily

• They repel each other

• They become more cohesive