Instructions
- Prepare Your Lab: You will need one inflated balloon and a safe space to move around.
- The Goal: Today you are a "Balloon Scientist." You will test how forces like gravity and air resistance affect a simple balloon.
- Follow the Sections: Complete the activities in order, filling in the tables and answering the questions as you go.
- Safety First: Make sure there are no breakable objects nearby while you are bouncing your balloon!
Section 1: The Gravity Test
Hold the balloon at shoulder height and let it go. Don't push it, just drop it. Observe how it falls compared to a heavy object like a shoe.
1. Which word best describes how the balloon falls? (Circle one)
- Rapidly
- Slowly
- Instantly
2. Why does the balloon fall differently than a shoe? (Hint: Think about the air pushing up against the bottom of the balloon.)
Section 2: Coordination Challenge
How many times can you bounce the balloon in the air without it touching the floor? Complete the table below using different parts of your body.
| Body Part Used | Prediction (How many bounces?) | Actual Result (Count them!) |
|---|---|---|
| Example: Right Hand | 10 | 14 |
| Left Hand | ||
| Elbow | ||
| Head | ||
| Knee | ||
| Foot |
Section 3: Force and Direction
3. If you hit the balloon with a lot of force (a hard smack), what happens to the balloon's path?
4. Directional Match-Up: Draw a line from the action to the result.
- Hit the balloon from underneath ---> Balloon moves sideways
- Hit the balloon from the left side ---> Balloon moves downward
- Hit the balloon from the top ---> Balloon moves upward
Section 4: The Static Science Experiment
Rub the balloon quickly against your hair or a wool sweater for 20 seconds. Then, try to "stick" it to a wall or see if it can make your hair stand up.
5. What did you observe during this experiment?
6. What is the name of the invisible force that makes the balloon stick to things after you rub it?
Section 5: The Wind Resistance Challenge
Find a piece of cardboard or a large book to use as a fan. While the balloon is in the air, wave the fan near it to see if you can change its direction without touching it.
7. Could you control the balloon using only air? How does this work?
Challenge Question (Optional)
Imagine you are on the Moon where there is no air (no air resistance). If you dropped a balloon and a hammer at the same time, which one do you think would hit the ground first? Why?
Answer Key
Section 1:
- Slowly
- The balloon is light and has a large surface area, so air resistance pushes up against it, slowing its fall. This is called "drag."
Section 2: Answers will vary based on student performance.
Section 3:
- It travels faster and further (acceleration).
- Underneath -> Upward; Left side -> Sideways; Top -> Downward.
Section 4:
- The balloon sticks to the wall or hair is attracted to the balloon.
- Static Electricity.
- Yes; the fan moves the air molecules, and those moving molecules push against the balloon.
Challenge Question: On the Moon, they would hit the ground at the same time because there is no air resistance to slow the balloon down. Only gravity is acting on them!