Classification

Why do Scientists Classify?

• The process of grouping things based on their similarities is classification.

• Biologists classify so that organisms are easy to study.

• The scientific study of how living things are classified is called taxonomy.

• Knowing the classification levels of an organism gives scientists a lot of information.

Levels of Classification

• Domain• Kingdom• Phylum• Class• Order• Family• Genus• Species

• Dear • King • Phillip • Came • Over • For • Good • Spaghetti

The naming system of Linnaeus

• Linnaeus placed organisms into groups based on their observable features (physical characteristics).

• Binomial nomenclature is a system that gives each organism a two part name.

• Scientific names – Written in italics and are in Latin.– Based on the organism’s Genus and Species

Domains and Kingdoms

• Three domains of living things– Bacteria– Archaea– Eukarya

• Organisms are placed into domains and kingdoms based on their– Types of cells– Ability to make food– Number of cells in their bodies

Domain Eukarya

• Includes Plants, Animals, Protists and Fungi• Organisms in this domain are Eukaryotes; their

cells contain a nucleus• Protists can be either unicellular or multicellular• Mushrooms, molds, mildew, and yeast are all

fungi• Plants are autotrophs; they can make their own

food.• Plants and Animals are all multicellular

Domains Archaea and Bacteria

• Domain Archaea– Contains Kingdom Archaebacteria– Bacteria that live in extreme environments

• Domain Bacteria– Contains Kingdom Eubacteria– Bacteria that can be found anywhere– Most are not harmful

Dichotomous KeysA dichotomous key is a tool that allows

the user to determine the identity of items in the natural world based on the items characteristics

"Dichotomous" means “divided into two parts” Greek origin

dichotomous keys always give two distinct choices in each step, often they are oppositesBlack/white; good/evil; pointed/rounded

Let’s practice making a dichotomous key with the random objects you have brought from your locker!

Fishbowl:Have each student write at least one question down about what they have learned today, or a question about what they still don’t understand. Put them all into a bowl together. Have each student draw out the card. Have students read aloud and answer each other’s questions