(the clue's in the name) One is conical and one is round-bottomed. A conical flask is better for sitting on a work surface as its base is flat. A round-bottomed flask is more often suspended i.e....
See the two Related Questions to the left for a description of each one. They are different in both shape and function. Florence flasks have round bottoms and no gradations indicating volume....
A beaker is like a Pitcher without the handle and smaller and a flask is like a rectangle container and has a weirdish top, in a lot of TV shows old woman keep flasks of alchohal in their purses.
From Wikipedia.com (see Link to the left): A Büchner flask, also known as a vacuum flask, filter flask, side-arm flask or Kitasato flask, is a thick-walled erlenmeyer flask with a short glass tube...
A volumetric flask is a container that is used to measure the volume of a liquid with extremely high accuracy. It is the best way to measure a specific quantity of a liquid. It cannot be used to...