Classification
Chapter 2
Objective
 SPI
0807.5.1 Use a simple classification key
to identify an unknown organism.



I can explain how organisms are classified
by their characteristics.
I can list the eight levels of classification in
order (domain, kingdom, phylum, class,
order, family, genus, and species).
I can identify the scientific name of an
organism using its genus and species name.
I can explain how organisms are classified
by their characteristics.
Classification (#18)
 Putting
things into orderly groups based
on similar characteristics.
 What things might you classify?
 Why do scientists classify living things?
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Know how many known species exist
Define characteristics
Identify species
Relationships between species
I can explain how organisms are classified
by their characteristics.
Classification
 Taxonomy:
the science of describing,
classifying, and naming living things.

Carolus Linnaeus created modern
taxonomy (before living organisms were
grouped as either plants or animals)
I can list the eight levels of classification in
order.
Classification System
 Eight
levels (broad to specific)
 Based on shared characteristics
 More shared characteristics→closer
organisms are related
I can list the eight levels of classification in
order.
Eight Levels
Levels
1.
2.
3.
4.
5.
6.
7.
8.
Domain (#24)
Kingdom (#47)
Phylum (#72)
Class (#17)
Order (#65)
Family (#35)
Genus (#38)
Species (#82)
Mnemonic (to help
you remember the
levels in order)
Dedicated
King
Phillip
Can
Order
Five
Giant
Sandwiches
I can list the eight levels of classification in
order.
I can identify the scientific name of an
organism using its genus and species name.
Scientific Names
 One
Species, One Name A scientific
name is always the same for a specific
kind of organism no matter how many
common names there might be.
 Two-Part
1.
2.
Names (italicized or underlined)
Genus name (capitalized)
Species name (lowercase)
I can identify the scientific name of an
organism using its genus and species name.
Scientific Names
 Elephas
maximus
 Tyrannosaurus rex
 Escherichia coli
 Tulipa gesneriana
 Cervus canadensis
 Delphinus capensis
I can identify the scientific name of an
organism using its genus and species name.
Complete Classification
Dog
Human

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Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Family: Hominidae
Genus: Homo
Species: sapien
Scientific name:
Homo sapien
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Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Family: Canidae
Genus: Canis
Specis: familaris
Scientific name:
Canis familaris
Objective
 SPI
0807.5.1 Use a simple classification key
to identify an unknown organism.
I
can identify an organism using a
dichotomous key or branching diagram.
 I can create a simple dichotomous key or
branching diagram to classify organisms.
I can identify an organism using a
dichotomous key or branching diagram.
Branching Diagram
I can identify an organism using a
dichotomous key or branching diagram.
Dichotomous Key
 Identification
aid that uses descriptive
statements to identify an unknown
organism
Objective
 SPI
0807.5.1 Use a simple classification key
to identify an unknown organism.
I
can classify an organism into the correct
domain and kingdom.
I can classify an organism into the correct
domain and kingdom.
Domain Archaea
 Prokaryote


Single-celled
No nucleus
 Live

in extreme environments
Form yellow or orange rings around hot
springs
I can classify an organism into the correct
domain and kingdom.
Domain Bacteria
 Prokaryote
 Can

live most anywhere
Soil, water, human body
 Good
and bad bacteria
 Example: E. coli
I can classify an organism into the correct
domain and kingdom.
Domain Eukarya
 Eukaryote



Multi-celled
Nucleus
Membrane bound organelles
 Kingdoms
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Protista
Fungi
Plantae
Animalia
I can classify an organism into the correct
domain and kingdom.
Kingdom Protista
 Single
celled or simple multi-celled
 Animal-like and plant-like
 Examples:

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
Protozoans
Slime molds
Algae
Euglenoids
I can classify an organism into the correct
domain and kingdom.
Kingdom Fungi
 Complex,
multi-celled
 Absorb nutrients from surroundings
 Decomposers: break down substances
 Examples:


Mushrooms
Mold
I can classify an organism into the correct
domain and kingdom.
Kingdom Plantae
 Complex,
multi-celled
 Cell
walls
 Photosynthesis
 Live on land and water
 Life depends on plants
 Examples:

Seaweed, grass, trees, algae
I can classify an organism into the correct
domain and kingdom.
Kingdom Animalia
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Complex, multi-celled
No cell walls
Specialized sense organs
Respond to environment
Mobile
Depend on plants for food, shelter, oxygen
Examples:
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Insects
Worms
Sponge
Humans
Turtle
Snake
Bird