AIM: What is a Dichotomous Key?

VOCABULARY:

Classification

Dichotomous Key

AIM: What is a Dichotomous Key?

Objectives:

1. You will be able to explain why classification systems are important.

2. You will be able to demonstrate your understanding with a dichotomous key.

AIM: What is a Dichotomous Key?

Question:

Why do we classify things (like at the shoe store or the grocery store)?

To make things easier!

AIM: What is a Dichotomous Key?

Question:

Why do scientists classify things?

TO MAKE THINGS EASIER

AIM: What is a Dichotomous Key?

AIM: What is a 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.

AIM: What is a Dichotomous Key?

1. Divides a larger group in smaller groups

2. Typically, it may separate objects into groups that “have it” and those that “don’t have it”

AIM: What is a Dichotomous Key?

AIM: What is a Dichotomous Key?

AIM: What is a Dichotomous Key?

AIM: What is a Dichotomous Key?

Dichotomous Key of Transportation Vehicles

Vehicles with wheels:

AIM: What is a Dichotomous Key?

Unicycle, skates, a/p, bike, train, car, bus

Canoe, boat, sailboat,

Dichotomous Key of Transportation Vehicles

Vehicles with wheels:

AIM: What is a Dichotomous Key?

Wheels made of rubber/plastic:

Unicycle, skates, ap, bike, train, car, bus

Canoe, boat, sailboat,

Dichotomous Key of Transportation Vehicles

Vehicles with wheels:

AIM: What is a Dichotomous Key?

Wheels made of rubber/plastic:

Unicycle, skates, ap, bike, train, car, bus

Canoe, boat, sailboat,

Unicycle, skates, ap bike, car, bus

train

Dichotomous Key of Transportation Vehicles

Vehicles with wheels:

AIM: What is a Dichotomous Key?

Wheels made of rubber/plastic:

Unicycle, skates, ap bike, train, car, bus

Canoe, boat, sailboat,

Unicycle, skates, ap bike, car, bus

train

Carries over 10 people:

Dichotomous Key of Transportation Vehicles

Vehicles with wheels:

AIM: What is a Dichotomous Key?

Wheels made of rubber/plastic:

Unicycle, skates, bike, train, car, bus

Canoe, boat, sailboat,

Unicycle, skates, bike, car, bus

train

Carries over 10 people:Bus, ap Unicycle, skates

bike, car

Dichotomous Key of Transportation Vehicles

Vehicles with wheels:

AIM: What is a Dichotomous Key?

AIM: What is a Dichotomous Key?

AIM: What is a Dichotomous Key?

Dichotomous Key of Animals

Animals with 4 legs

AIM: What is a Dichotomous Key?

Horse, gorilla, cow Ostrich, worm, shark, man, rooster

Dichotomous Key of Animals

Animals with 4 legs:

AIM: What is a Dichotomous Key?

Animals with tail:

Horse, gorilla, cow Ostrich, worm, shark, man, rooster

Dichotomous Key of Animals

Animals with 4 legs :

AIM: What is a Dichotomous Key?

Animals with tail:

Horse, gorilla, cow Ostrich, worm, shark, man, rooster

Horse, cow gorilla

Dichotomous Key of Animals

Animals with 4 legs:

AIM: What is a Dichotomous Key?

Animals with a tail:

Horse, gorilla, cow Ostrich, worm, shark, man, rooster

Horse, cow gorilla

Animals with utters:

Dichotomous Key of Animals

Animals with 4 legs:

AIM: What is a Dichotomous Key?

Ostrich, worm, shark, man, rooster

Animals with a tail:

Horse, gorilla, cow

Horse, cow gorilla

Animals with utters:cow horse

Dichotomous Key of Animals

Animals with 4 legs:

AIM: What is a Dichotomous Key?

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

AIM: What is a Dichotomous Key?

Class Activity

AIM: What is a Dichotomous Key?

Homework:

INTERNET QUESTIONS

WRITE A PARAGRAPH SUMMARIZING

THE AIM USING THE VOCABULARY