Presentation on theme: "Classification of Organisms"— Presentation transcript:
1 Classification of Organisms Appropriatefor grades(5-9)Developed by:Andrew LeechStudents should be able to:* Understand why a classification system is important* Understand that there are a variety of ways to classifyorganisms* Understand the origins of our modern classification system
2 What is an Organism? An organism is generally referred to any living thing. More specifically any thing that has“cells”. This includes the smallest of organisms,the single celled bacteria, all the way to thelargest redwood tree or Blue Whale.
3 The Classification Game!! Divide into groups of 3 or 4In the following few slides, you will find14 different organisms, each of them labeledwith a letter. In your groups, write downtwo main classification (example red/green).Then place the corresponding letters underthe correct classification.
4 For Example These organisms have been classified by their color. Red Green
8 Did You Have Problems??There were actually several different ways to goabout classifying these 14 organisms. You mighthave done color, shape, size, number of legs… thepossibilities are endless. You might have encounteredone or two that really did not fit into either of yourtwo classifications, what should you do when thishappens? Make a new classification of course! Andthis is what scientist have done as well through theyears.
9 Our modern classification system originated with two main classifications, plants and animals. Overthe years, scientist came up with certain “plants”that really did not act like plants, they couldn’tmake their own food. So the kingdom Fungi wasformed.
10 When microscopes were invented, scientist discovered new single celled organisms. Some were animal-like,some were plant like and some were both.This lead to the creation of the Kingdom Protista.
11 As the microscope improved, scientist discovered that many of the single celledorganisms were quite different. Some of themhad a nucleus and others did not. This leadto the Kingdom Monera, the kingdom of themost simplistic organisms.
12 Who first developed a system to classify organisms? As early as 350 B.C., the Greek PhilosopherAristotle created guidelines for groupingliving things. Aristotle grouped organismsbased on four characteristics: body parts,life histories, activities, and character. Therewere ten groups of animals, six of whichhe called “blooded” and four “bloodless”.
13 Humans, birds and fish were considered to be blooded, while insects and mollusks wereconsidered to be bloodless. Aristotle’s systemmay seem crude by today’s standards, but forhis time, it was extremely imaginative.
14 Who Needs a Classification System? When you go to the grocery store, how doknow how to find the milk?When you go to the clothing store, how doyou know where to look for your favorite brand?When you go to the movie store, how do youfind the movie you’re looking for?
15 When you want to learn about the mating habits of the Blue Swallow Butterfly, wheredo you find your information.It is for this reason that a classification systemis necessary. It is a tool that allows scientistto study similar organisms to learn more abouthow certain organisms work and function.
16 For example; if you wanted to find information on a new organism that you just discovered,you could look at organisms with similartraits and could come up with some goodideas as to what it eats, mating habits, orany other pertinent information you mightwant to find.
17 Who developed the modern system? Along with Aristotle’s version of the classificationsystem, there were several more, completelydifferent systems added throughout the years.After a while, it became quite confusing formany scientist when they did their research,they did not know which system to look in.This lead towards a universal system thatcould be used world wide.
18 The Modern System The modern classification system was developed by the Swedish scientist CarolusLinnaeus in the mid 1700’s. As Linnaeuscreated his method of classification, heconsidered many things. Some characteristicshe used to classify organisms were outsideappearance, internal organs, and how bodysystems worked. Modern scientists are still usingmost of Linnaeus’s classification system.
19 Linnaeus used the Latin language because that was the language thatwas dominate around the world atthat time. This is why even todayorganism’s scientific names are alwaysin Latin.
20 Along with the two major Kingdoms, Plant and Animal, Linnaeus came up with several sub-classifications for thosekingdoms. They are: Kingdom, Phylum,Class, Order Family, Genus, and Species.What Kingdom are you in?What phylum are you in? Why?
21 The Human Species Kingdom: Animalia (Animal in Latin) Phylum: Class: Order:Family:Genus:Species:Animalia (Animal in Latin)Chordata (Spinal Cord)Mammalia (have mammary glands)Primates (two mammary glands)Hominoidea (bipedalism)HomoSapien
22 When you refer to an organism scientifically, you always use the genus and the specie names.Therefore, the human species wouldbe referred to as:Homo sapien
23 Conclusion The classification system for organisms have been around for a long time. It hasendured several changes and is quitecomplex. Without it modern biology couldnot exist, much in the same way thata grocery store would go out of businessif it did not have a classification system.