1. VOCABULARY:
Classification
Dichotomous Key

2. You will be able to explain why classification systems are important.
Objectives:
You will be able to explain why classification systems are important.
You will be able to demonstrate your understanding with a dichotomous key.

3. Question:
Why do we classify things (like at the shoe store or the grocery store)?
To make things easier!

4. Question:
Why do scientists classify things?
TO MAKE THINGS EASIER

6. Dichotomous Key
Is a system used by scientists to CLASSIFY unknown organisms by examining the characteristics of the organism and then determining to which group that unknown organism should be placed based upon those characteristics.

7. Divides a larger group in smaller groups
Dichotomous Key
Divides a larger group in smaller groups
Typically, it may separate objects into groups that “have it” and those that “don’t have it”

8. Look at these Pictures

9. What do they have in
Common?

10. Copy this diagram

11. Dichotomous Key of Transportation Vehicles
Vehicles with wheels:

12. Dichotomous Key of Transportation Vehicles
Vehicles with wheels:
Canoe, boat, sailboat,
Unicycle, skates, a/p, bike, train, car, bus

13. Dichotomous Key of Transportation Vehicles
Vehicles with wheels:
Unicycle, skates, ap, bike, train, car, bus
Canoe, boat, sailboat,
Wheels made of rubber/plastic:

14. Dichotomous Key of Transportation Vehicles
Vehicles with wheels:
Unicycle, skates, ap, bike, train, car, bus
Canoe, boat, sailboat,
Wheels made of rubber/plastic:
Unicycle, skates, ap bike, car, bus
train

15. Dichotomous Key of Transportation Vehicles
Vehicles with wheels:
Unicycle, skates, ap bike, train, car, bus
Canoe, boat, sailboat,
Wheels made of rubber/plastic:
Unicycle, skates, ap bike, car, bus
train
Carries over 10 people:

16. Dichotomous Key of Transportation Vehicles
Vehicles with wheels:
Unicycle, skates, bike, train, car, bus
Canoe, boat, sailboat,
Wheels made of rubber/plastic:
Unicycle, skates, bike, car, bus
train
Carries over 10 people:
Bus, ap
Unicycle, skates bike, car

17. What are These?

18. Animals

19. Dichotomous Key of Animals
Animals with 4 legs

20. Dichotomous Key of Animals
Animals with 4 legs:
Ostrich, worm, shark, man, rooster
Horse, gorilla, cow

21. Ostrich, worm, shark, man, rooster
Dichotomous Key of Animals
Animals with 4 legs :
Horse, gorilla, cow
Ostrich, worm, shark, man, rooster
Animals with tail:

22. Ostrich, worm, shark, man, rooster
Dichotomous Key of Animals
Animals with 4 legs:
Horse, gorilla, cow
Ostrich, worm, shark, man, rooster
Animals with tail:
Horse, cow
gorilla

23. Ostrich, worm, shark, man, rooster
Dichotomous Key of Animals
Animals with 4 legs:
Horse, gorilla, cow
Ostrich, worm, shark, man, rooster
Animals with a tail:
Horse, cow
gorilla
Animals with utters:

24. Dichotomous Key of Animals
Animals with 4 legs:
Horse, gorilla, cow
Ostrich, worm,
shark, man, rooster
Animals with a tail:
Horse, cow
gorilla
Animals with utters:
cow
horse

25. Tips for Classifying
Carefully observe objects to “notice” similarities and differences
Place objects into either one group or another – not both groups
Examine each group you create – to see if it can be further subdivided

26. Class Activity

27. Homework:
INTERNET QUESTIONS
WRITE A PARAGRAPH SUMMARIZING
THE AIM USING THE VOCABULARY