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Stage 1
Answer 4 questions correctly in a row.
The passage below describes an experiment.

bubbles at a party
- Jeanette
has a bubble machine and wants to know how to make the bubbles last longer. She read that bubbles burst when the liquid that makes up the bubbles evaporates. Jeanette knew that when liquids are warmer, they evaporate faster. So, she wondered if she could make her bubbles last longer by cooling the bubble solution. - Jeanette
cooled six bottles of bubble solution to 30°F below room temperature. She left another six bottles of bubble solution at room temperature. Then, she measured how long bubbles made from the solution in each bottle lasted.
In this experiment, which were part of an experimental
group?
the bottles that were at room temperature
the bottles that were cooled down
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