Home Page Scientific Methods Cell Structure Cell Function Microbes Plants Animals Biology Activities Biology4Kids Sections Search

Kingdoms - Slideshow

Planet Earth from Space

Why would we start a slideshow about kingdoms with an image of the Earth? We want you to realize that the Earth is the only place that has known life. We're not even talking about aliens. Neither microscopic organisms nor complex molecules have been discovered on another planet or moon (or dwarf planet). Our planet is very special and unique.

The living organisms of Earth are broken down into two large groupings. You will hear about the prokaryotes (cells without a nucleus) and eukaryotes (cells with a nucleus). This original domain breakdown was even larger than kingdoms. Most of the kingdoms we discuss will be in the domain Eukarya.

While originally broken into two domains, scientists now use a three-domain system of classification. During the past decade, scientists have broken down the prokaryote domain into Eubacteria (Bacteria), and Archaebacteria (Archea).

Always remember that the current naming and classification system is just a general rule. As we learn more about each species, they might move into new kingdoms. As science gathers more information, it will always adjust. Even with the flaws, the biological system of classification works well. Think about Pluto. It was classified a planet before there was a definition of a planet or knowledge of other objects larger than Pluto. Astronomers downgraded Pluto to the status of 'dwarf planet.' Even though you might not hear about it on the news, new information always leads to changes in science.

Image Credit: NASA

- Home Page
- Taxonomy Ex.
> Activities
- Site Map
- Site Tour
- Help Topics

Link to Link to Link to Link to Link to Link to Rader Network Side Navigation
- Biology4Kids: Kingdoms
- Biology4Kids: Species
- Biology4Kids: Microbes
- Biology4Kids: Plants
- Biology4Kids: Invertebrates
- Biology4Kids: Vertebrates

Search for more information...

* The custom search only looks at Rader's sites.

Help Page Go for site help or a list of life science topics at the site map!
©copyright 1997-2014 Andrew Rader Studios, All rights reserved.
Current Page: | Activities and Slideshows | Kingdoms

** Andrew Rader Studios does not monitor or review the content available at external web sites. They are paid advertisements and neither partners nor recommended web sites. Specific links for books on are only suggested starting points for further research. Please browse, research options, and choose the appropriate materials for your needs.