We headed outside with our balloons, Mr. Nelson and this burner, made out of a small camp stove and a duct pipe. Each of the groups took turns holding their balloon over the pipe as they filled with hot air and then just let it go. Each floated upward, some faster than others, some higher than others - one MUCH higher. Four out of the five balloons were recovered. It was an awesome experiment!
- Reported by the whole 4N class
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