Classification & Dichotomous KeyGoals:I can list the taxonomic classification levels in order

I can recognize a properly written scientific name

I can use a dichotomous key to classify and name organisms

8 Major Categories of Classification• Species is the most specific

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Domain

6th Grade Review6.12C Recognize that the broadest taxonomic

classification of living organisms is divided into currently recognized Domains

• All living things are classified into taxonomic groups: the largest and broadest umbrella is the domain

• The 3 Domains for the Taxonomic Classification of Living Things are as follows: – Archaea – live in extreme environments, one-celled

critters = unicellular – Bacteria – most are decomposers, some cause

disease (also called Eubacteria) – Eukaryota – protists, fungi, plants & animals

6.12D Identify the basic characteristics of organisms, including prokaryotic or eukaryotic, unicellular or multicellular, autotrophic or heterotrophic, and mode of reproduction that further classify them in the currently recognized Kingdoms

• There are currently 6 kingdoms – organisms are placed into the kingdoms based on the number and type of cells they have, and their nutritional needs.

• The 6 Kingdoms of living things (some are unicellular and/or multicellular) are as follows: Archaebacteria – unicellular, prokaryotic Eubacteria – unicellular, prokaryotic Fungi – unicellular or multicellular (heterotrophic) and eukaryotic Protists – unicellular or multicellular (autotrophic, heterotrophic) and

eukaryotic Plants – multicellular (autotrophic) and eukaryotic Animals – multicellular (heterotrophic) and eukaryotic

• Plant cells are termed autotrophic – plants are producers: make their own food through photosynthesis

• Animal cells are heterotrophic-animals are consumers

6th Grade Review

Taxonomy Classification• Taxonomy – the science of classifying (naming) organisms• Binomial Nomenclature

– developed by Carolus Linnaeus– 2-word naming system (genus and species)

• Examples:– Felis concolor (mountain lion)– Ursus arctos (brown bear)– Homo sapiens (humans)– Panthera leo (lion)– Panthera tigris (tiger)

• Recognize and properly write a scientific name: Homo sapiens, or Homo sapiens, or H. sapiens – 1st word is Capitalized –Genus– 2nd word is lowercase —species– Underline– Italicize– Abbreviate the genus (first name) (P. tigris or P. leo)

Dichotomous Key• Use a dichotomous key to identify or to

distinguish one type of organism or object from another. (2 choices – yes/no for each trait)

• The branches can show who is most closely related to whom.

Shoe Dichotomous Key

1. a. This shoe covers the toes completely……………..…go to 2b. This shoe does NOT cover the toes completely………………..go to 3

1a 1b

Shoe Dichotomous Key1. a. This shoe covers the toes completely……

go to 2b. This shoe does NOT cover the toes completely……go to 3

1a 1b

Shoe Dichotomous Key

2. a. This shoe is black and white……go to 4b. This shoe has color……………….…Shoe dill

2a 2b

Shoe Dichotomous Key

2. a. This shoe is black and white……go to 4b. This shoe has color……………….…Shoe dill

2a 2b

Shoe Dichotomous Key

3. a. This shoe is flat……………Shoe marchb. This shoe is NOT flat……Shoe helvey

3a 3b

Shoe Dichotomous Key3. a. This shoe is flat……………Shoe march

b. This shoe is NOT flat……Shoe helvey

3a 3b

Shoe Dichotomous Key

4. a. This shoe covers the ankle……Shoe Kiserb. This shoe does NOT cover the ankle…Shoe Jones

4a4b

Shoe Dichotomous Key

4. a. This shoe covers the ankle……Shoe Kiserb. This shoe does NOT cover the ankle…Shoe Jones

4a4b

Dichotomous Key Activities

Lady Bug Dichotomous Key

1. a. If the lady bug has feather like antennas….go to 2 b. If the lady bug has knob antennas…..go to 4

2. a. Spotted wings present…… Ladea ashley b. Solid wings present……….. go to 3

3. a. Has six legs…………………………..Ladea kaley b. Has 4 legs…………………………...Ladea jessica

4. a. Solid abdomen present…. Ladea elena b. Stripes on abdomen………go to 5

5. a. Spotted wings……Ladea rachel b. Solid wings……..…Ladea allison

A

B

C

D

E

F

Leaf Dichotomous Key

1. a. If the leaf has many smaller leaves on it, called leaflets…….go to 2 b. If the leaf does NOT have any leaflets…..go to 3

2. a. If the leaflets are rounded…… Robinia pseudoacacia b. If the leaflets are pointed……. Fraxinus pennsylvanica

3. a. If leaf veins are singular…………………………..go to 4 b. If the leaf veins have multiple branches….go to 5

4. a. If the leaf edges are pointed …. Castanea dentata b. If the leaf edges are rounded …Quercus stellata

5. a. If leaf is fat and round…Populus tremuloides b. If the leaf is shaped like a hand …Acer saccharinum

Alien Dichotomous Key

1. a. Alien with antennae………………….go to 2 b. Alien with without hair..…..go to 3

2. a. Alien with mouth……………….Alienus robert b. Alien without mouth…………Alienus george

3. a. Alien with 2 eyes …… Alienus jack b. Alien with 3 eyes……. go to 4

4. a. Alien with splatter chest…. Alienus sam b. Alien without splatter…Alienus bob

A

B

C

D

E

Taxonomic Classification & Scientific Names

1. Come up with your own way to remember the 8 major categories of classification in order. (Explain it.)

2. Explain 3 ways of writing a scientific name for an organism. (Be specific)

3. What is the most diverse taxonomic level?4. What is the most specific taxonomic level?5. Explain which organisms (A-D) are the closest

related? Explain.6. Which organism (A-D) is least like the others? Explain.7. List the current domains of taxonomic classification.8. List the current kingdoms of taxonomic classification.

A B C DKingdom Animalia Animalia Animalia AnimaliaPhylum/Division

Chordata Chordata Chordata Chordata

Class Mammalia Mammalia Mammalia AvesOrder Primate Carnivora Carnivora AnseriformesFamily Homindae Felidae Felidae AnatidaeGenus Homo Panthera Panthera AnasSpecies sapiens leo tigris acuta

Answer Key

Lady Bug Dichotomous Key1. a. If the lady bug has feather like antennas….go to 2 b. If the lady bug has knob antennas…..go to 4

2. a. Spotted wings present…… Ladea ashley F b. Solid wings present……….. go to 3

3. a. Has six legs…………………………..Ladea kaley E b. Has 4 legs…………………………...Ladea jessica C

4. a. Solid abdomen present…. Ladea elena D b. Stripes on abdomen………go to 5

5. a. Spotted wings……Ladea rachel A b. Solid wings……..…Ladea allison B

A

B

C

D

E

F

Leaf Dichotomous Key

1. a. If the leaf has many smaller leaves on it, called leaflets…….go to 2 b. If the leaf does NOT have any leaflets…..go to 32. a. If the leaflets are rounded…… Robinia

pseudoacacia D b. If the leaflets are pointed……. Fraxinus

pennsylvanica C3. a. If leaf veins are singular…………………………..go to 4 b. If the leaf veins have multiple branches….go to 54. a. If the leaf edges are pointed …. Castanea

dentata E b. If the leaf edges are rounded …Quercus stellata A5. a. If leaf is fat and round…Populus tremuloides B b. If the leaf is shaped like a hand …Acer

saccharinum F

Alien Dichotomous Key

1. a. Alien with antennae ………………….go to 2 b. Alien with without hair..…..go to 3

2. a. Alien with mouth……………….Alienus

robert E b. Alien without mouth…………Alienus

george C

3. a. Alien with 2 eyes …… Alienus jack B b. Alien with 3 eyes……. go to 4

4. a. Alien with splatter chest…. Alienus sam D

b. Alien without splatter…Alienus bob A

A

B

C

D

E

Taxonomic Classification & Scientific Names1. Come up with your own way to remember the 8 major categories of

classification in order. (Explain it.) answers vary Explain - (domain, kingdom, phylum, class, order, family, genus, species)

2. Explain 3 ways of writing a scientific name for an organism. (Be specific) italicized, underline, abbreviate the genus and write out the species – in all the 1st letter of the genus is capitalized and nothing else

3. What is the most diverse taxonomic level? domain4. What is the most specific taxonomic level? species5. Explain which organisms (A-D) are the closest related? Explain. B and C –

they share the same genus6. Which organism (A-D) is least like the others? Explain. D, all the others

share the same class7. List the current domains of taxonomic classification. Archaea, Bacteria,

Eukaryota 8. List the current kingdoms of taxonomic classification. Archaebacteria,

Eubacteria, Fungi, Protists, Plants, Animals

A B C DKingdom Animalia Animalia Animalia AnimaliaPhylum/Division

Chordata Chordata Chordata Chordata

Class Mammalia Mammalia Mammalia AvesOrder Primate Carnivora Carnivora AnseriformesFamily Homindae Felidae Felidae AnatidaeGenus Homo Panthera Panthera AnasSpecies sapiens leo tigris acuta

Try Making your own Dichotomous Key

• You can use objects in the room or draw your own pictures.

• Use at least 6 objects.