Controlled Experiments (4:06)https://www.youtube.com/watch?v=D3ZB2RTylR4“Biology: Controlled Experiments.” YouTube. Nucleus Medical Media, 5 Apr. 2012. Web. 1 Sep. 2011. Essential QuestionHow do controlled experiments produce accurate and reliable results? Holt McDougal Chemistry Chapter 2 Section 1 pages 27-291. What is the difference between accidental discoveries and scientific investigations? 2. What is the difference between qualitative and quantitative data? […]