Grade 7 - Dichotomous Keys

awan

Dichotomous key is:

a tool that allows the user to determine the identity of items in the natural world

"Dichotomous" means "divided into two parts".

Therefore, dichotomous keys always give two choices in each step.

A, B, C

ANIMALS

Has blue colored body

Has dark blue colored body

Has 4 legs

Has 8 legs

A, B C

Has a

tail

Doesn’t have a tail

B A

Has ears Doesn’t have ears

D, F E

D, E, F

Has a pointy hump

Doesn’t have a pointy hump

F D

A, B, C

ANIMALS

Has blue colored body

Has dark blue colored body

Has 4 legs

Has 8 legs

A, B C

Has a

tail

Doesn’t have a tail

B A

Has ears Doesn’t have ears

D, F E

D, E, F

Has a pointy hump

Doesn’t have a pointy hump

F D

11

22

33

44

55

bbaa

bbaa bbaa

bbaa bbaa

Please make a dichotomous keyThe object is your friends

Submit your HW next meeting:

3 October 2013