You use a bubble map to write an essay by drawing circles and writing down the flow of ideas and materials that you are going to use. Draw a circle in the middle of the page and write down the main points. From there, draw some small circles that will represent your sub points and how one point will link to another. You will then follow this track to compile your essay.
You can't for an essay. An essay is a detailed 3 or more paragraph page that has an opening paragraph that includes a topic sentence stating what your writing about and a few more sentences (at least 4) that back up the topic sentence. The next paragraph(s) should have a large idea (about your topic) in the first sentence and supporting details. The ending paragraph should briefly restate the opening one with the final sentence being a ending version of your opening sentence.