Answer:
An observational study, not an experiment.
Explanation:
Researchers investigated reasons why different species of birds begin to sing at different times of the morning. They captured and examined birds of 57 species at different sites around England. They reported that there is a strong relationship between the diameter of a bird's eye and the time it starts singing in the morning: birds with larger eyes tend to start singing earlier.This is an example of An observational study, not an experiment.
The independent variable is the amount of alcohol/alcohol and the dependent variable is car accidents. as the number of car accidents depends on how much alcohol the person consumed
Answer:
Southern unionist
Explanation:
A Southern Unionist was a white Southerner who either opposed secession and the Confederate States of America and/or supported the Union or stayed neutral.
It depends. If the museum is famous and popular then there could be more than 100 people there. If the museum is small and unknown, then there could be very small groups. I didn't really understand your question but I hope this helps!
