Free Printable Dichotomous keys

Worksheets

Dichotomous keys

Total questions: 20

Worksheet time: 25mins

Name

Class

Date

Tool used by a taxonomist to identify an unknown organism is a:

dichotomous key

binomial nmenclature

scientific name

binomial key

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

physical features

weather patterns

environment

diet

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

What is the name of bird W?

Certhidea

Geospiza

Camarhynchus

Platyspiza

What is the name of bird Z?

Certhidea

Geospiza

Camarhynchus

Platyspiza

What is a dichotomous key used for in science?

To organize biomes

Classify organisms

Identify bacteria only

None of these

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?

Whip Scorpion

Wind Scorpion

Daddy long legs

Scorpion

Using this dichotomous key, identify the name of the circled Fish, J.

peacock flounder

band-tail puffer

trumpet fish

spotted goat fish

Using this dichotomous key, identity the name of the circled fish.

band-tail puffer

spotted goat fish

peacock flounder

trumpet fish

10.

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

11.

Which of the following characteristics will most likely be helpful in identifying a butterfly using a dichotomous key?

Migrates north every spring

hangs on branches

flutters wings fast on hot days

Wings have long extensions

12.

What is monster # 1 ?

Alienus quadlegicus

Alienus haircus

Alienus Tritoothicus

Alienus Blobicus

13.

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

Class Insecta

Order Amblygygi

Order Araneae

Order Scorpiones

14.

A botanist discovers a new plant in the jungle. Which of the
following observations of the plant’s characteristics would be useful in determining its identity with a dichotomous key?

It was discovered in the summertime

It is wet from a recent rain storm.

Its leaves curl up on the edges.

It is eaten by native jungle ants.

15.

What is the name of bird Z?

Certhidea

Geospiza

Camarhynchus

Platyspiza

16.

Leaf S (3RD LEAF)

Eastern white pine

balsam poplar

sweet gum

ginko

17.

What type of characteristics are used to make a dichotomous key?

Characteristics that make an organism different from any other organism. (type of beaks, claws, root systems)

Characteristics like age of an organism

Where the organism lives

How many organisms live in the environment

18.

Which characteristics are used to identify the American Robin?

Head color, Beak shape, and Beak Color

Head color and Beak Color

Beak Shape and Beak Color

Beak Color

19.

Leaf Q (1ST LEAF)

Eastern white pine

balsam poplar

sweet gum

ginko

20.

What is monster # 2 ?

Alienus Fuzzicus

Alienus Stripicus

Alienus Tritoothicus

Alienus Blobicus

Reset

Dichotomous keys

Total questions: 20

Worksheet time: 25mins

Similar Resources on Wayground