Question

the passage below describes an experiment. eve was using steel to make rusted sculptures. after building each sculpture, she caused it to rust by placing it in salt water for eight hours. eve wondered if steel would rust faster if she added vinegar to the salt water. eve cut ten squares of steel sheet metal. she put five of the squares into a tub filled with salt water. she put the other five squares into a tub filled with salt water mixed with vinegar. once an hour for eight hours, eve counted how many steel squares in each group had rust on them. in this experiment, which were part of an experimental group? the steel squares soaked in salt water and vinegar the steel squares soaked in salt water

Explanation:

In an experiment, the experimental group is the one that receives the variable being tested. Here, the variable is vinegar added to salt - water. So the steel squares soaked in salt water and vinegar are in the experimental group.

Answer:

the steel squares soaked in salt water and vinegar