Is Mass Change a Problem in Transformers Prime?: How Transformation works

Did you ever just look at Predaking and wonder how he could get so big while only just being taller than Megatron? Or how can Arcee become so small that a human can ride on her? What is going on with Bulkhead and his tires?! Something is up, but it is mass changing or just design flaws? Let's find the answers in the Transformers Prime concept art book and toss in a pinch of speculation! Ending- Tetris theme:    • Video