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Stage 1
Answer 4 questions correctly in a row.
Rose plays with a balloon and notices that it picks up tiny pieces of paper after she rubs it against her hair. She remembers learning that this was caused by a transfer of charge from her hair to the balloon. Rose wonders what factors might affect how much charge transfers to a balloon and how well it picks up paper as a result. So she decides to design an experiment. She has the following supplies available:
- six air-filled balloons
- a wool sweater
- a polyester shirt
- a humidifier
- a bag of paper confetti
Using only these supplies, which two questions can Rose investigate with an experiment?
Does a balloon rubbed against wool pick up more paper than a balloon rubbed against polyester does?
Does a balloon rubbed against silk pick up more paper than a balloon rubbed against polyester does?
Does a balloon left near a humidifier pick up less paper after being rubbed against wool than a balloon placed away from a humidifier does?
Does a balloon left in the freezer pick up more paper after being rubbed against wool than a balloon left at room temperature does?
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