5th Grade Science Quiz
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MATTER AND ITS INTERACTIONS
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Comparing the substances before and after mixing, a student mixed yeast with warm sugar water in a bottle.
Before mixing:
- Yeast: tan grains, Solid, 22°C, bread-like smell
- Sugar water: clear, Liquid, 35°C, no smell
After mixing (after 10 minutes):
- Mixture: bubbles rising and foam on top, Liquid with gas bubbles, 35°C, bread-like smell
Which observation is the best evidence that a gas was produced?
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