The scientific method consists of five steps: form a question, hypothesize, create an experiment, make observations, and then conclude.
(Some reword the method differently, but this was how I was taught it.)
Do roses smell better than lilies? and Is the color red better than the color green? wouldn't work because the answers are going to be based on opinions.
The best answer is Do red or orange flowers attract more butterflies? You're able to conduct an experiment based on this question by planting red flowers on one side and orange flowers on the other, waiting and watching to see which flowers the butterflies are more attracted to.
