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Keys 1

In this worksheet, students will be helped to practise their work on keys, using features to identify an object or living thing. Both spider keys and clue keys are practised.

'Keys 1' worksheet

Key stage:  KS 2

Curriculum topic:  Living Things and Their Habitats

Curriculum subtopic:  Classification Keys

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

 Keys are used to help to identify something. They are really useful when studying habitats as there are so many plants and animals that students (and teachers!) do not know the name of; keys help to find out the name of the organism.

 

There are two main sorts of keys:

SPIDER KEYS use a branching system like this:

 

CLUE KEYS use clues to help find the name, like this:

 

Clue 1 If the flower is yellow go to Clue 2
  If the flower is not yellow  go to Clue 4

 

and so on.

In the following questions use the keys to try to identify the object.  You will also be asked to use the key to find the name of the object using clues about it given in the key.

Use the key to find the names of these children:

 

A is a girl who wears glasses

B is a girl who has a hat on

C is a boy with glasses

D is a boy without glasses

Column A

Column B

A is
Alfie
B is
Mike
C is
Chelsea
D is
Holly

Here are three animals:

Wasp Deer Zebra
WASP DEER ZEBRA

 

Follow this key through to match the correct animal to its letter:

Column A

Column B

A is
Zebra
B is
Deer
C is
Wasp

Look at these pictures of six different geese:

 

Goose key

 

Use the key to fit the correct name to each bird. (Hint: start with Bird A, use the key to find its name, then move on to Bird B, and so on).

Clue 1

If the bird has a long beak go to Clue 2
  If the bird has a short beak go to Clue 5
Clue 2 If the bird's tail is up go to Clue 3
  If the bird's tail is down go to Clue 4
Clue 3 If the bird has a long neck HERBERT
  If the bird has a short neck ROGER
Clue 4 If the bird has a long neck SIDNEY
  If the bird has a short neck EDGAR
Clue 5 If the bird's tail is up DESMOND
  If the bird's tail is down WILLIAM

 

Column A

Column B

Bird A is
William
Bird B is
Edgar
Bird C is
Roger
Bird D is
Herbert
Bird E is
Sidney
Bird F is
Desmond

Look at these four shapes:

 

Circle Square Rectangle Triangle
CIRCLE SQUARE RECTANGLE  TRIANGLE

 

Use this key to match the letter to the shape:

Column A

Column B

A is
Circle
B is
Triangle
C is
Square
D is
Rectangle

Look at these five aliens:

 

A B C D E

 

Use this key to find out their names:

CLUE 1  If the alien is furry  go to Clue 2
   If the alien has no fur  go to Clue 3
CLUE 2  If the alien has a mouth  SPLURGE
   If the alien has no mouth  TRIBBLE
 CLUE 3  If the alien has two eyes  go to Clue 4
   If the alien has three eyes  GOOBER
 CLUE 4  If the alien has four arms  PICKME
   If the alien has two arms and two legs  ZOG

Column A

Column B

Alien A is
Splurge
Alien B is
Zog
Alien C is
Tribble
Alien D is
Goober
Alien E is
Pickme

Use the key to find the names of each funny dinosaur:

 

 
A B C D E

 

CLUE 1  If the dinosaur has a tail  go to Clue 3
   If the dinosaur has no tail  go to Clue 2
CLUE 2  If the dinosaur has wings  ZOOMASAURUS
   If the dinosaur has no wings  BUMPOSAURUS
CLUE 3  If the dinosaur is green  go to Clue 4
   If the dinosaur is blue  GOOGASAURUS
CLUE 4  If the dinosaur has spots  SNOROSAURUS
   If the dinosaur has no spots  STUMPOSAURUS

Column A

Column B

Dinosaur A is
Snorosaurus
Dinosaur B is
Zoomasaurus
Dinosaur C is
Googasaurus
Dinosaur D is
Stumposaurus
Dinosaur E is
Bumposaurus
  • Question 1

Use the key to find the names of these children:

 

A is a girl who wears glasses

B is a girl who has a hat on

C is a boy with glasses

D is a boy without glasses

CORRECT ANSWER

Column A

Column B

A is
Chelsea
B is
Holly
C is
Mike
D is
Alfie
EDDIE SAYS
Take child A: to the question "does the child wear glasses?" the answer is 'YES'. Following the 'YES' arrow to the question "is it a boy?" you answer 'NO'. So that child is Chelsea.
  • Question 2

Here are three animals:

Wasp Deer Zebra
WASP DEER ZEBRA

 

Follow this key through to match the correct animal to its letter:

CORRECT ANSWER

Column A

Column B

A is
Wasp
B is
Zebra
C is
Deer
EDDIE SAYS
Take a zebra: 'does it have stripes?' = YES; 'can it fly' = NO, so B is zebra.
  • Question 3

Look at these pictures of six different geese:

 

Goose key

 

Use the key to fit the correct name to each bird. (Hint: start with Bird A, use the key to find its name, then move on to Bird B, and so on).

Clue 1

If the bird has a long beak go to Clue 2
  If the bird has a short beak go to Clue 5
Clue 2 If the bird's tail is up go to Clue 3
  If the bird's tail is down go to Clue 4
Clue 3 If the bird has a long neck HERBERT
  If the bird has a short neck ROGER
Clue 4 If the bird has a long neck SIDNEY
  If the bird has a short neck EDGAR
Clue 5 If the bird's tail is up DESMOND
  If the bird's tail is down WILLIAM

 

CORRECT ANSWER

Column A

Column B

Bird A is
Sidney
Bird B is
Herbert
Bird C is
Desmond
Bird D is
William
Bird E is
Roger
Bird F is
Edgar
EDDIE SAYS
Take Bird A: it has a long beak, so go to Clue 2. Its tail is down, so go to Clue 4. It has a long neck so that goose is called Sidney. Do each bird by starting from Clue 1.
  • Question 4

Look at these four shapes:

 

Circle Square Rectangle Triangle
CIRCLE SQUARE RECTANGLE  TRIANGLE

 

Use this key to match the letter to the shape:

CORRECT ANSWER

Column A

Column B

A is
Triangle
B is
Square
C is
Rectangle
D is
Circle
EDDIE SAYS
Take the rectangle and follow this through: it has four straight edges whose sides are not the same length; so you'd have answered YES, NO, NO to the three questions.
  • Question 5

Look at these five aliens:

 

A B C D E

 

Use this key to find out their names:

CLUE 1  If the alien is furry  go to Clue 2
   If the alien has no fur  go to Clue 3
CLUE 2  If the alien has a mouth  SPLURGE
   If the alien has no mouth  TRIBBLE
 CLUE 3  If the alien has two eyes  go to Clue 4
   If the alien has three eyes  GOOBER
 CLUE 4  If the alien has four arms  PICKME
   If the alien has two arms and two legs  ZOG
CORRECT ANSWER

Column A

Column B

Alien A is
Tribble
Alien B is
Goober
Alien C is
Splurge
Alien D is
Pickme
Alien E is
Zog
EDDIE SAYS
Take Alien E: he is not furry (to clue 3), he has two eyes (to clue 4) and has two arms and two legs, so it's ZOG!
  • Question 6

Use the key to find the names of each funny dinosaur:

 

 
A B C D E

 

CLUE 1  If the dinosaur has a tail  go to Clue 3
   If the dinosaur has no tail  go to Clue 2
CLUE 2  If the dinosaur has wings  ZOOMASAURUS
   If the dinosaur has no wings  BUMPOSAURUS
CLUE 3  If the dinosaur is green  go to Clue 4
   If the dinosaur is blue  GOOGASAURUS
CLUE 4  If the dinosaur has spots  SNOROSAURUS
   If the dinosaur has no spots  STUMPOSAURUS
CORRECT ANSWER

Column A

Column B

Dinosaur A is
Stumposaurus
Dinosaur B is
Snorosaurus
Dinosaur C is
Googasaurus
Dinosaur D is
Zoomasaurus
Dinosaur E is
Bumposaurus
EDDIE SAYS
Take Dinosaur C: it has a tail (to Clue 3) and is blue = Googasaurus!
---- OR ----

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