Amoeba is a genus that belongs to Kingdom protozoa. Generally, the term is used to describe single celled organisms that move in a primitive crawling manner (by using temporary "false feet" known as pseudopods).
Amoebas are eukaryotes, which means that their genetic material are well organized and enclosed within a membrane.
Amoebas are simply single celled organisms. As such, they can only be viewed using a microscope. There are methods that can be used to observe these organisms.
The first and simplest methods involves viewing amoebas under the microscope without staining. This is a simple method that allows students to view them live as they move around. The second method involves fixing and staining to get a better view of the structure and organelles of the organism.