Baking powder and baking soda are both leavening agents, but there are some key differences. Baking powder is a dry, chemical leavening agent that contains baking soda, an acid, and a moisture absorber. When baking powder is exposed to moisture and heat, carbon dioxide is released and causes the dough or batter to rise. Baking soda is a pure form of sodium bicarbonate that requires an additional acid in order for it to activate and cause the dough or batter to rise. 
 

Julienning and dicing are both methods of cutting food, but there are some key differences. Julienning is a method of cutting food into thin, matchstick-sized pieces. The food is cut into strips, then each strip is cut into matchstick-sized pieces. Dicing is a method of cutting food into small cubes. The food is cut into strips, then each strip is cut into small cubes of uniform size.

The most famous bridge in the world is probably the Golden Gate Bridge in San Francisco, California. It was built in the 1930s and is one of the most iconic structures in the United States. It spans 1.7 miles and is a popular tourist attraction.