aim: what is classifying? vocabulary: classification levels (tiers)

AIM: What is Classifying?

AIM: What is classifying?

VOCABULARY:

Classification

Levels (tiers)


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.


Question:

How many different types of music are there?

Rap, classic …

Country, heavy metal …

Rock, dance …

Hip hop, children’s …


Question:

Could you imagine shopping at a music store which did not separate their CD’s by type?

Or artist

But just left them in a pile!


IMAGINE:

Shopping at a shoe store where boys, girls, men, women’s and kids shoes were all mixed together?

Would it work?

Would you go back?

How are shoe stores typically classified?


Why do Scientists Classify?

To make things easier

To groups things


Classification:

1. organization into groups or categories.

2. Categorization of a population by common characteristics which the population has or does not have.

3. Make sure characteristics are observations and not inferences !


INSECTS


INSECTS

Those with wings

Those without wings

Two Two Group Group SystemSystem


Animals


Animals

Animals with 4 legs

Animals with 2 legs

Three Group System

With no legs


Animals

Animals with 4 legs Animals

with 2 legs

Three Group System

With no legs


Animals

Animals with 4 legs

Animals with 2 legs With no legs

With Tail No Tail

wingsNo wings

gills No gills

3 groups

2 Levels


Insects

have wings

Wings fold over body

No wings

Wings don’t fold

Antennae No antennae

2 groups

2 Levels


INSECTS

Those with wings

Those without wings

You want to title each groups or level with descriptive observations – not just examples.


Class Activity

WS1 WS2


Homework:

INTERNET QUESTIONS

WRITE A PARAGRAPH SUMMARIZING

THE AIM USING THE VOCABULARY

aim: what is classifying? vocabulary: classification levels (tiers)

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