What are some factors that might cause our percent yield to be greater than 100%? what are some factors that might cause it to be less than 100%? make sure you discuss specific cases of how both might happen.

In the field of science, usually, the product of an experiment is computed ahead to understand if it reached a specific objective. It would reach greater than 100% of percent yield if the factors include faster reaction rates; proper handling of the reactants, no outside contaminants, and the procedure of the experiment is followed smoothly. It would reach lesser than 100% percent yield if the experiment is not followed, external factors such as contamination from the environment (wind, moisture, etc). 

The flowers in a flower arrangement are actually alive

It could possibly be beneficial if the experiment is successful.