## Question: Do Large or Small Bubbles Reach the Ground Faster?

Remember the last time you blew bubbles with a wand and bubble solution? Did you ever wonder as a whether the big bubbles hit the ground before the small bubbles? Or Visa Versa. This experiment will show you the answer to that question, and it will be a lot of fun!

**Materials Needed:**

Pencil

Foam cup

Wide, shallow bowl

Drinking straw

Bubble solution

**Procedure:**

- Fill the bowl with bubble solution.
- Push the pencil through the side of the foam cup, close to the bottom.
- Remove the pencil.
- Push the drinking straw through the opening so that it goes all the way inside the foam cup. This is the bubble pipe.
- Flip the whole bubble pipe upside down and place it into the bubble solution.
- Lift the bubble pipe up.
- Blow into the straw softly to make bubble form on the top of the foam cup.
- After a small bubble forms the shape, twist the foam cup quickly to discharge the bubble. In the meantime, hit the "Start" button on your stopwatch.
- Using your stopwatch, time how long it takes for the bubble to hit the ground and record the results in a chart.
- Now blow nine more small bubbles, and then record how long it takes for them to reach the ground.
- Blow ten big bubbles, using the method in the previous steps. Record how long it takes for the bubbles to reach the ground in the second column of the chart.
- Compute the average time it took for each size of bubble to hit the ground by adding up every column and dividing the sum by 10. Look at the result to get your definitive answer.