1. The scientific name of the saltwater crocodile is Crocodylus porosus.
Classification
The scientific name of the saltwater crocodile is Crocodylus porosus.

2. Types of living things
Living things are classified by similar characteristics.
Each different type of organism is called a species.
It is estimated that there are over ten million different species on Earth.
All of the same kind of dust mite are members of a single species.

3. Carolus Linneaus Lived in 1700’s
Attempted to classify all known organisms by only their shared characteristics.
Example: If it swam or ran or if it had hair or scales

4. Classifying life
To classify a living thing into one of the kingdoms, scientists ask 3 questions:
Does it have prokaryotic (contains no nucleus) cells or eukaryotic (does have a nucleus) cells?
Is it single-celled (one-celled) or multicellular (many-celled)?
Does it get energy by making its own food (as a producer) or by getting food from other organisms (as a consumer)?

6. Plant and Animal kingdoms compared:

7. Classification Pyramid
Kingdom
Phylum
Class
Order
Family
Genus
Species

8. Classification King Phillip Came Over For Good Spaghetti K Kingdom
P Phylum
C Class
O Order
F Family
G Genus
S Species

9. Naming Names
An organism’s scientific name is always the same for a specific organism no matter how many common names it has.
Scientist from all over the world use the same scientific name.

10. Naming names
Before Linneaus some scientist used as many as 15 Latin names.
Linneaus gave each organism a two part name.
Linneaus used his observations to devise a naming system for organisms known as binomial nomenclature.

11. Understanding Scientific Names
“bi” = two
“nomem” = name
Binomial nomenclature= two names
1st part= Genus
2nd part = species
The first name is capitalized, the second name is not.

12. Scientific Names
A scientific name is the two-part, scientifically recognized name given to an organism, consisting of its genus and species.

13. Scientific Names
You may have a difficult time understanding scientific names because they are usually in Latin or Greek.
Felis is Latin for “cat” and domesticus is Latin for “domesticated.”

14. Greek & Latin Names The name actually has a full meaning.
Ex: Tyrannosaurus rex- 1st part = “tyrant lizard”
2nd part = “King”
The name should be either underlined or italicized.

15. What is this animal called?
Skunk
Une Mouffette
Cheche
Un Zorrillo
Mephitis mephitis

16. Levels of classification
Organisms with shared characteristics are grouped together.
What characteristic do these organisms share?

17. Levels of classification
For animals, the levels of classification are: kingdom, phylum, class, order, family, genus, and species.
At what level are these two animals classified differently?

18. Dichotomous Keys
A dichotomous key is a tool that helps its user identify natural objects like birds, trees, rocks, fungi, and insects.
Dichotomous means "divided into two parts.”
Turn in your book to page 50 and identify the organism in Figure 3.8

19. Dichotomous Keys
It is difficult to create a key for the kingdoms because there are so many organisms to consider.

20. Dichotomous Keys
A dichotomous key turns questions into paired statements.

21. Dichotomous Keys
Most dichotomous keys are designed to identify small groups like trees, butterflies, and song birds.
Can you suggest a way to tell these arthropod classes apart?

22. Dichotomous Keys
Here is one solution… follow on page 52.