Classification

Chapter 9

Notebook Page 111

Standard

S7L1 Students will investigate the diversity of living organisms and how they can be compared scientifically.

a. Demonstrate the process for the development of a dichotomous key.

b. Classify organisms based on a six-kingdom system and a dichotomous key.

Essential Questions

What do scientists do when a new species is discovered?

How and why are organisms grouped?

Why have classification systems changed over time?

Classification – Page 112

Putting things into groups based on similar characteristics.

What are some things that humans classify?

Why do we classify things?

People classify things everyday to make life easier.

What would life be like if grocery stores were not classified? How long would it take to find food?

Scientists classify organisms to make answering scientific questions easier.

What are the relationships between species? What differences exist among species?

How do we classify?

Taxonomy is the science of classifying and naming living organisms.

Carolus Linnaeus was a scientist that began classifying and naming organisms based on similarities.

Cladograms show the evolutionary similarities and differences between organisms. See page 223.

Branching Diagram (Cladogram)

The more characteristics that organisms have in common the more closely related they are. These diagrams also show that these organisms have a common ancestor.

Cladogram Practice Sheet

Analyze the cladogram Page 114.

Levels of Classification There are many levels into which organisms

are classified.

Those levels are:DomainKingdomPhylumClassOrderFamilyGenusSpecies

Mnemonic Can you develop a mnemonic for the seven

levels of classification?

Dumb Kids Prefer Candy Over Fancy Green Salad

Create your own mnemonic on page 115 of your notebooks.

Examine pages 224-225

Attach the table below to page 116 of your notebook.

Highlight the levels of classification.

Levels become more specific as you go down and more general as you go up.

Cobra Human Brown Spider

Kingdom Animalia Animalia Animalia

Phylum Chordata Chordata Arthropods

Class Reptilia Mammalia Arachnids

Order Squamata Primates Araneae

Family Elapidae Hominidae Loxoscelidae

Genus Ophiophagus Homo Loxosceles

Species hannah sapiens reclusa

Scientific Names Because of classification scientists can give

organisms scientific names.

We use common names for organisms but scientific names are important for communication with scientists that speak other languages.

Organisms can have many common names but each organism has only one scientific name.

Scientific names are taken from the organisms classification.

The genus and species level classifications are used to name organisms.

Ex: Asian Elephant

Scientific Name : Elephas maximus Must be written with genus name capitalized, and in italics.

Genus Species

Elephas Maximus

Attach the following table to your notebook on page 87

Copy these questions below the table and highlight the correct answers.

1. If two organisms belong to the same order they must also belong to the same ______.a. Familyb. Phylumc. Speciesd. Genus

2. What type of organism is Vulpes velox?a. Foxb. Dogc. Wolfd. Gopher

 3. In the table, the species name for a fly is M. domestica. What does the M stand for? 4. What is the full scientific name for a fly? 5. Two plants, Virginia mertensia and Virginia hospatcia belong to the same what?

a. Family, genus and speciesb. Order genus and speciesc. Order, family and genusd. Species , kingdom and phylum

Quick Review --- Concept Map 9

Complete on page 88 of your notebook.