s: What is Impressionist art? How does it differ from other art styles? Who was the American Impressionist painter Julian Alden Weir, and how did he use the Impressionist style to portray his surroundings? Duration: 30 – 45 minutes Essential Questions: What is Impressionist art? How does it differ from other art styles? Who was the American Impressionist painter Julian Alden Weir, and how did he use the Impressionist style to portray his surroundings?.