Taxonomic Key

Dichotomous Key

SWBAT: interpret dichotomous keys by the end of the period ​

First. which insect do you want to identify? Lets try B

You start with the first step on top.
In this case, it is 1a and 1b

then follow the instructions.

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How to read Dichotomous keys

Multiple Choice

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta
• Order Amblygygi
• Order Araneae
• Order Scorpiones

Multiple Choice

When using a dichotomous key to identify organisms, what do we look at?

• physical features
• weather patterns
• environment
• diet

Multiple Choice

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?

• Juniper
• Pine
• Spruce
• Fir

Multiple Choice

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger.

The student uses the dichotomous key below to identify it.

1. a) Abdomen segmented.............go to 2

b) Abdomen not segmented ......go to 4

2. a) Abdomen with tail....................go to 3

b) Abdomen without tail...............go to 5

3. a) Tail with stinger..........................Scorpion

b) Tail without stinger.....................Whip scorpion

4. a) Legs longer than body.............Daddy Long Legs

b) Legs not longer than body……….Wind scorpion

5. a) Covered with spines .......................Mite

b) Few spines.....................................Tick

• Whip Scorpion

• Daddy Long Legs

• Mite

• Tick

Multiple Choice

Which letter in the picture has two pairs of wings?

• M

• K

• F

• L

Multiple Choice

Which leaf is shown in the drawing?

• Magnolia

• Redbud

• Sweetgum

• None of the above

Multiple Choice

Which shark is the picture of?

• Cow Shark

• Great White Shark

• Hammerhead Shark

• Saw Shark

Work with your partner

Find out the name of all the minions using the dichotomy chart.

7min
Voice Level 2

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GROUP PRACTICE

Work on this Dichotomy worksheet by yourself.

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Voice Level 0

8min

Independent Practice

Exit ticket- quizizz