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Dichotomous Keys Skills Check

Total questions: 20

Worksheet time: 18mins

Name
Class
Date
1.

What step do we always start with when using dichotomous keys?

(a)  

2.

The word "dichotomous" means...

a)

divided into two parts

b)

not living

c)

two cots for me to sleep on

3.
When using a dichotomous key to identify organisms, what do we look at?
(a)  
a)

physical features

b)

weather patterns

c)

environment

d)

diet

4.

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?

(a)  

5.

What is monster # 4 ?

a)

Alienus Fuzzicus

b)

Alienus Stripicus

c)

Alienus Quadlegicus

d)

Alienus Blobicus

6.
What is the name of bird W?
(a)  
Choose from the below words
Geospiza
Certhidea
Camarhynchus
Platyspiza
7.
What is the purpose of a dichotomous key?
a)
to find a common ancestor
b)
to show the evolution of organisms
c)
to see what organisms eat
d)
to identify organisms
8.

Identify leaf F


(a)  
Choose from the below words
Magnolia
Cydonia
Aesculus
Fraxinus
Ilex
9.

A student examines the winged insect using the picture.

Based on the key, in what order should this insect be classified?

(a)  

10.

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

(a)  

11.
Using this dichotomous key, identify the name of the circled Fish, J.
a)
peacock flounder
b)
band-tail puffer
c)
trumpet fish
d)
spotted goat fish
12.

What is monster # 1 ?

a)

Alienus quadlegicus

b)

Alienus haircus

c)

Alienus Tritoothicus

d)

Alienus Blobicus

13.

Identify the fish

a)

Sebastes serriceps

b)

Sebastes nebulosus

c)

Naucrates ductor

d)

Seriola lalandi

14.

Which shark is the picture of?

a)

Cow Shark

b)

Great White Shark

c)

Hammerhead Shark

d)

Saw Shark

15.
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. Which arachnid has the student found?
a)
Whip Scorpion
b)
Wind Scorpion
c)
Daddy long legs
d)
Scorpion
16.
A table of arachnid and insect characteristics is shown. Which characteristic could be used to distinguish between
arachnids and insects?
(a)  
Choose from the below words
Presence of antennae
Jointed legs
Body segments
Presence of eyes
17.

Use the dichotomous key to identify this white wildflower

a)

Starflower

b)

Chickweed

c)

Common Strawberry

d)

Bowman's root

18.

Identify leaf F

a)

Cydonia

b)

Magnolia

c)

Aesculus

d)

Fraxinus

e)

Ilex

19.

What is the name of this alien?

a)

Alienus Greeno

b)

Alienus Hairy

c)

Alienus Tooth

d)

Alienus Fuzzicus

20.
What is the name of bird Z?
a)
Certhidea
b)
Geospiza
c)
Camarhynchus
d)
Platyspiza