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EU: Traits are used to put animals together in the same group or to separate

them into different groups.

EQ: What did scientists use to classify organisms before?

HOW DOES THE PRESENCE/ABSENCE OF TRAITS AFFECT THE CLASSIFICATION OF

ORGANISMS?

Objectives:

1. Identify the characteristics used to classify organisms.

2. Identify organisms using dichotomous keys.

Materials:

1. Dichotomous Key

2. Picture of Norns

Procedures:

1. Use the dichotomous key to identify the norns.

2. Write their complete scientific name in the blank. The scientific name is

the true name of any organism. It is made up of the genus name and the

species name. The 1st letter of the genus name must be written in capital

letter, while the 1st letter of the species name must be written in small

letter.

PAREF SOUTHRIDGE SCHOOL

Grade School Unit

Science 6

Name: ___________________________________ Class Number: ______________

Section: ___________________________________ Date: ______________

Second Quarter: Seatwork/Homework ______=______%

Using Dichotomous Keys

ABOUT NORNS

Norns belong to the genus Norno and

can be divided into eight species that are

generally located in specific regions of the

world.

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Dichotomous Key

1. Trait 1: _________________________________________________________________

a. Has rounded ears ........................................................ go to 2

b. Has pointed ears .......................................................... go to 3

2. Trait 2: _________________________________________________________________

a. Has tail ........................................................................... dakotus

b. Has no tail ...................................................................... kentuckyus

3. Trait 3: _________________________________________________________________

a. Ears point downward ................................................... go to 4

b. Ears point upward ........................................................ go to 5

4. Trait 4: _________________________________________________________________

a. Has hairy tufts on ears ................................................. californius

b. Has no hairy tufts on ears ........................................... dallus

5. Trait 5: _________________________________________________________________

a. Engages in waving behavior ..................................... walawala

b. Does not engage in waving behavior ..................... go to 6

6. Trait 6: _________________________________________________________________

a. Has hair on top of head ............................................. beverlus

b. Has no hair on top of head ........................................ go to 7

7. Trait 7: _________________________________________________________________

a. Has a tail ....................................................................... yorkio

b. Has no tail....................................................................... rajus

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Norno Norno

Norno Norno

Norno Norno

Norno Norno