VOCABULARY: Classification Dichotomous Key

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.

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

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

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.

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”

Look at these Pictures

What do they have in Common?

Copy this diagram

Dichotomous Key of Transportation Vehicles Vehicles with wheels:

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

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

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

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:

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

What are These?

Animals

Dichotomous Key of Animals Animals with 4 legs

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

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

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

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:

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

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

Class Activity

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