This document discusses classification systems for organisms and introduces dichotomous keys. It begins by asking the reader to identify organisms from pictures and describe their identifying characteristics. It then outlines the learning objectives which are to describe classification systems, design dichotomous keys, and explain the importance of standardized classification. Various classification systems like libraries, vehicle registration, and nationality are mentioned. The document goes on to provide examples of classification ranks for organisms and introduces Mr. Men characters to classify. It poses questions at the end about defining classification, variation, and the importance of standardized classification methods.

1. To Start
Can you Identify each of the
organisms in the pictures?
What characteristics allow you to
identify them?

2. Learning Objectives
• Describe the systems we use for the
classification of organisms
• Design a Dichotomous Key
• Explain why it is important to have a
standardised system for classifying organisms

3. Systems of Classification
• Library Books

4. Systems of Classification
• Car registration plates

5. Systems of Classification
• Nationality

6. Classification of
Organisms
• Eukarya
• Animalia
• Chordata
• Chondrichthyes
• Lamniformes
• Lamnidae
• Carcharodon
• carcharias

7. Dichotomous Key

8. Classification
and
Taxonomy
The process of
categorising
living things and
naming them
e.g. Lion
Panthera leo –
Mammal,
Animal Kingdom

10. Classifying Mr Men
1. Mr Bump
2. Mr Tickle
3. Mr Strong
4. Mr Daydream
5. Mr Sneeze
6. Mr Forgetful
7. Mr Happy
8. Mr Greedy
9. Mr Nosey
10. Mr Bounce
11. Mr Slow
12. Mr Nonsense
13. Mr Mischief
14. Mr Busy
15. Mr Fussy
16. Mr Messy
17. Mr Clever
18. Mr Skinny
19. Mr Lazy
20. Mr Worry
21. Mr Tall
22. Mr Mean
23. Mr Perfect
24. Mr Dizzy

11. Questions to Finish
1. Define the word ‘Classification’
2. Define the word ‘Variation’
3. Explain why the Classification of all living organisms is
important
4. Why is it important to use a standardised method of
classificating organisms? What does this mean?
5. Why does variation amongst species make classification
difficult?

12. A Dichotomous Key

13. Why Do We Need
Dichotomous Keys?
There are
approximately 275
species of Turtle and
they all look very
similar!