Question

what is the difference between morphing and shape tweening

Answer 1

Morphing and inbetweening (tweening) are special techniques in animation using flash that have become very common these days. Of the two, people are more aware of morphing but it is inbetweening, commonly known as just tweening that is creating a buzz because of the ability to allow the user to create intermediate frames when he is moving from one image to another. 

Answer 2

One key difference between shape tweeing and motion tweening is that you do notshape tween symbols. To use motiontweening, your objects must be a symbol. ... A great natural example to use for shape tweening is clouds. As clouds move across the sky they naturally change shape.