1. Dichotomous Keys!
Chapter 2.1 (pages 52-53)

2. Key concepts: Explain why and how organisms are classified.
Describe how dichotomous keys help in identifying organisms.

3. Key Vocabulary: Classification Dichotomous key Domain Taxonomy
Binomial Nomenclature

4. We take a look in a yearbook. What do we see?
In a world of games:
We take a look in a yearbook. What do we see?

5. Dichotomous Key:
Where have we discussed classification before?
Think “GUESS WHO”
Classification is putting things into orderly groups based on similar characteristics.
What have we discussed so far about classification?
Dichotomous Key: used to separate a variety of organisms according to species.

6. How to use them: Developed: Uses descriptive statements
Only 2 alternative responses for each statement
You choose the statement that best describes the organism
This will lead you to more statements that better classify the organisms

7. A Simple Dichotomous Key:

8. A Simple Dichotomous Key:

9. One More:

10. Claudograms

11. Review:
In classification, organisms are grouped according to the characteristics the organisms share.
Classification lets scientists answer important questions about the relationships between organisms.
A dichotomous key is a tool for identifying organisms that uses a series of paired descriptive statements.

12. Homework: Workbook pages Finish the “shapes worksheet” Workbook pages: