Watercolor painting styles • English Conversation Questions

What are the different watercolor painting styles?
Can you describe the loose and expressive style of watercolor painting?
How does the traditional transparent watercolor style differ from other styles?
What is the wet-on-wet technique commonly used in watercolor painting?
What is the dry-brush technique and how is it used in watercolor painting?
How can you achieve a hard-edge effect in watercolor painting?
What are some common subject matters in realistic watercolor painting?
Can you explain the concept of negative painting in watercolor?
What are some examples of contemporary watercolor painting styles?
What are some of the challenges of painting with watercolors?
Can you describe the difference between a traditional watercolor and a watercolor-gouache painting?