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Keys 2

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

'Keys 2' worksheet

Key stage:  KS 2

Curriculum topic:  Living Things and Their Habitats

Curriculum subtopic:  Characteristics and Classification

Difficulty level:  

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 below to put these animals into their correct classification group.

Snake Tiger Frog Goldfish  Owl
A B C D E

Column A

Column B

Animal A is a
Bird
Animal B is a
Reptile
Animal C is a
Amphibian
Animal D is a
Mammal
Animal E is a
Bony Fish

Here are some minibeasts:

Snail Worm Centipede Spider Beetle Hoverfly
SNAIL WORM CENTIPEDE SPIDER BEETLE HOVERFLY

 

Use the clue key below to work out which minibeast matches which letter:

Clue 1 If the animal has jointed legs go to Clue 3
  If the animal has no legs go to Clue 2
Clue 2 If the animal has a shell Animal A
  If the animal has no shell Animal C
Clue 3 If the animal has six legs go to Clue 4
  If the animal has more than six legs go to Clue 5
Clue 4 If the animal has two wings Animal D
  If the animal has hard black wing cases Animal F
Clue 5 If the animal has eight legs Animal E
  If the animal has more than eight legs Animal B

 

Column A

Column B

Snail is
Animal E
Worm is
Animal D
Centipede is
Animal B
Spider is
Animal C
Beetle is
Animal A
Hoverfly is
Animal F

Here are a selection of delicious cakes!

Cup cakes Chocolate cake Birthday cake Fruit cake Cup cakes cup cake with candle

 

Here is a key which sorts out the cakes according to their characteristics:

Use the key to find out which brown cake is served in slices but does not contain raisins.

Hooray Cake

Munch Cake

Chomp Cake

Yummy Cake

Gulp Cake

Happy Cake

Here are a selection of delicious cakes!

cup cakes chocolate cake birthday cake fruit cake cup cakes cup cake with candle

 

Here is a key which sorts out the cakes according to their characteristics:

Use the key to find out which cake with roses on is a fairy cake that is not brown in colour.

Hooray Cake

Munch Cake

Chomp Cake

Yummy Cake

Gulp Cake

Happy Cake

Here are a selection of delicious cakes!

cup cakes chocolate cake birthday cake fruit cake cup cakes cup cake with candle

 

Here is a key which sorts out the cakes according to their characteristics:

Use the key to find out which cake, without raisins in, is brown in colour and not served in slices.

Hooray Cake

Munch Cake

Chomp Cake

Yummy Cake

Gulp Cake

Happy Cake

Here are some Liquorice Allsorts:

liquorice allsorts

Here is a clue key to help sort them out:

 

Clue 1 If the sweet has some black colour on it go to Clue 2
  If the sweet has no black colour on it go to Clue 7
Clue 2 If the sweet is square go to Clue 3
  If the sweet is round go to Clue 5
Clue 3 If the sweet has a brown layer Sweet G 
  If the sweet does not have a brown layer go to Clue 4
Clue 4 If the sweet has a green layer Sweet D
  If the sweet has an orange layer Sweet E
Clue 5 If the sweet has white in the middle Sweet H
  If the sweet has no white colour go to Clue 6
Clue 6 If the sweet has pink colouring Sweet B
  If the sweet has yellow colouring Sweet C
Clue 7 If the sweet has pink colouring Sweet F
  If the sweet has blue colouring Sweet A

 

Use the key to find out which square sweet has some black and an orange colour.

Sweet A

Sweet B

Sweet C

Sweet D

Sweet E

Sweet F

Sweet G

Sweet H

Here are some Liquorice Allsorts:

liquorice allsorts

Here is a clue key to help sort them out:

Clue 1 If the sweet has some black colour on it go to Clue 2
  If the sweet has no black colour on it go to Clue 7
Clue 2 If the sweet is square go to Clue 3
  If the sweet is round go to Clue 5
Clue 3 If the sweet has a brown layer Sweet G 
  If the sweet does not have a brown layer go to Clue 4
Clue 4 If the sweet has a green layer Sweet D
  If the sweet has an orange layer Sweet E
Clue 5 If the sweet has white in the middle Sweet H
  If the sweet has no white colour go to Clue 6
Clue 6 If the sweet has pink colouring Sweet B
  If the sweet has yellow colouring Sweet C
Clue 7 If the sweet has pink colouring Sweet F
  If the sweet has blue colouring Sweet A

 

Use the key to find out which round sweet has pink but not black colouring.

Sweet A

Sweet B

Sweet C

Sweet D

Sweet E

Sweet F

Sweet G

Sweet H

Here are some Liquorice Allsorts:

liquorice allsorts

Here is a clue key to help sort them out:

Clue 1 If the sweet has some black colour on it go to Clue 2
  If the sweet has no black colour on it go to Clue 7
Clue 2 If the sweet is square go to Clue 3
  If the sweet is round go to Clue 5
Clue 3 If the sweet has a brown layer Sweet G 
  If the sweet does not have a brown layer go to Clue 4
Clue 4 If the sweet has a green layer Sweet D
  If the sweet has an orange layer Sweet E
Clue 5 If the sweet has white in the middle Sweet H
  If the sweet has no white colour go to Clue 6
Clue 6 If the sweet has pink colouring Sweet B
  If the sweet has yellow colouring Sweet C
Clue 7 If the sweet has pink colouring Sweet F
  If the sweet has blue colouring Sweet A

 

Use the key to find out which round sweet has both black and pink colours.

Sweet A

Sweet B

Sweet C

Sweet D

Sweet E

Sweet F

Sweet G

Sweet H

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

 

Use the key to find out which round coin is bronze and 20mm across.

£2

£1

50p

20p

10p

5p

2p

1p

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

 

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

Use the key to find out which round coin is silver in colour and 25mm across.

£2

£1

50p

20p

10p

5p

2p

1p

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

 

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

 

Use the key to find out which 7-sided coin is 21mm across.

£2

£1

50p

20p

10p

5p

2p

1p

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

 

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

 

Use the key to find out which round coin is round, not silver or bronze but gold & silver in colour.

£2

£1

50p

20p

10p

5p

2p

1p

  • Question 1

Use the key below to put these animals into their correct classification group.

Snake Tiger Frog Goldfish  Owl
A B C D E

CORRECT ANSWER

Column A

Column B

Animal A is a
Reptile
Animal B is a
Mammal
Animal C is a
Amphibian
Animal D is a
Bony Fish
Animal E is a
Bird
EDDIE SAYS
This key helped you to use their features to place each animal into its correct group (which you probably knew anyway!). So, for Animal A (the snake) it has scales but no gills, so it is a REPTILE.
  • Question 2

Here are some minibeasts:

Snail Worm Centipede Spider Beetle Hoverfly
SNAIL WORM CENTIPEDE SPIDER BEETLE HOVERFLY

 

Use the clue key below to work out which minibeast matches which letter:

Clue 1 If the animal has jointed legs go to Clue 3
  If the animal has no legs go to Clue 2
Clue 2 If the animal has a shell Animal A
  If the animal has no shell Animal C
Clue 3 If the animal has six legs go to Clue 4
  If the animal has more than six legs go to Clue 5
Clue 4 If the animal has two wings Animal D
  If the animal has hard black wing cases Animal F
Clue 5 If the animal has eight legs Animal E
  If the animal has more than eight legs Animal B

 

CORRECT ANSWER

Column A

Column B

Snail is
Animal A
Worm is
Animal C
Centipede is
Animal B
Spider is
Animal E
Beetle is
Animal F
Hoverfly is
Animal D
EDDIE SAYS
This key helps you to sort out six minibeasts: if we take the CENTIPEDE - it has jointed legs (to clue 3), more than 6 legs (to clue 5) and more than 8 legs.
  • Question 3

Here are a selection of delicious cakes!

Cup cakes Chocolate cake Birthday cake Fruit cake Cup cakes cup cake with candle

 

Here is a key which sorts out the cakes according to their characteristics:

Use the key to find out which brown cake is served in slices but does not contain raisins.

CORRECT ANSWER
Munch Cake
EDDIE SAYS
Follow it through: is the cake brown? = YES; does it have raisins in? = NO; is it served in slices = YES; so that's Munch Cake!
  • Question 4

Here are a selection of delicious cakes!

cup cakes chocolate cake birthday cake fruit cake cup cakes cup cake with candle

 

Here is a key which sorts out the cakes according to their characteristics:

Use the key to find out which cake with roses on is a fairy cake that is not brown in colour.

CORRECT ANSWER
Hooray Cake
EDDIE SAYS
Follow it through: is the cake brown? = NO; is it a fairy cake? = YES; does it have any roses on it? = YES; so that's Hooray Cake!
  • Question 5

Here are a selection of delicious cakes!

cup cakes chocolate cake birthday cake fruit cake cup cakes cup cake with candle

 

Here is a key which sorts out the cakes according to their characteristics:

Use the key to find out which cake, without raisins in, is brown in colour and not served in slices.

CORRECT ANSWER
Gulp Cake
EDDIE SAYS
Follow it through: is the cake brown? = YES; does it have raisins in? = NO; is it served in slices = NO; so that's Gulp Cake!
  • Question 6

Here are some Liquorice Allsorts:

liquorice allsorts

Here is a clue key to help sort them out:

 

Clue 1 If the sweet has some black colour on it go to Clue 2
  If the sweet has no black colour on it go to Clue 7
Clue 2 If the sweet is square go to Clue 3
  If the sweet is round go to Clue 5
Clue 3 If the sweet has a brown layer Sweet G 
  If the sweet does not have a brown layer go to Clue 4
Clue 4 If the sweet has a green layer Sweet D
  If the sweet has an orange layer Sweet E
Clue 5 If the sweet has white in the middle Sweet H
  If the sweet has no white colour go to Clue 6
Clue 6 If the sweet has pink colouring Sweet B
  If the sweet has yellow colouring Sweet C
Clue 7 If the sweet has pink colouring Sweet F
  If the sweet has blue colouring Sweet A

 

Use the key to find out which square sweet has some black and an orange colour.

CORRECT ANSWER
Sweet E
EDDIE SAYS
Follow it through: it has some black colour (to clue 2), it's square (to clue 3), does not have a brown layer (to clue 4) and has an orange layer = Sweet E.
  • Question 7

Here are some Liquorice Allsorts:

liquorice allsorts

Here is a clue key to help sort them out:

Clue 1 If the sweet has some black colour on it go to Clue 2
  If the sweet has no black colour on it go to Clue 7
Clue 2 If the sweet is square go to Clue 3
  If the sweet is round go to Clue 5
Clue 3 If the sweet has a brown layer Sweet G 
  If the sweet does not have a brown layer go to Clue 4
Clue 4 If the sweet has a green layer Sweet D
  If the sweet has an orange layer Sweet E
Clue 5 If the sweet has white in the middle Sweet H
  If the sweet has no white colour go to Clue 6
Clue 6 If the sweet has pink colouring Sweet B
  If the sweet has yellow colouring Sweet C
Clue 7 If the sweet has pink colouring Sweet F
  If the sweet has blue colouring Sweet A

 

Use the key to find out which round sweet has pink but not black colouring.

CORRECT ANSWER
Sweet F
EDDIE SAYS
Follow it through: it has no black colour (to clue 7) and has pink colouring = Sweet F.
  • Question 8

Here are some Liquorice Allsorts:

liquorice allsorts

Here is a clue key to help sort them out:

Clue 1 If the sweet has some black colour on it go to Clue 2
  If the sweet has no black colour on it go to Clue 7
Clue 2 If the sweet is square go to Clue 3
  If the sweet is round go to Clue 5
Clue 3 If the sweet has a brown layer Sweet G 
  If the sweet does not have a brown layer go to Clue 4
Clue 4 If the sweet has a green layer Sweet D
  If the sweet has an orange layer Sweet E
Clue 5 If the sweet has white in the middle Sweet H
  If the sweet has no white colour go to Clue 6
Clue 6 If the sweet has pink colouring Sweet B
  If the sweet has yellow colouring Sweet C
Clue 7 If the sweet has pink colouring Sweet F
  If the sweet has blue colouring Sweet A

 

Use the key to find out which round sweet has both black and pink colours.

CORRECT ANSWER
Sweet B
EDDIE SAYS
Follow it through: it has some black colour (to clue 2), it's round (to clue 5), has no white colour (to clue 6) and has pink colouring = Sweet B.
  • Question 9

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

 

Use the key to find out which round coin is bronze and 20mm across.

CORRECT ANSWER
1p
EDDIE SAYS
Follow it through: the coin is round (to 4), is not silver (to 6), is bronze (to 7) and 20mm across = 1p.
  • Question 10

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

 

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

Use the key to find out which round coin is silver in colour and 25mm across.

CORRECT ANSWER
10p
EDDIE SAYS
Follow it through: the coin is round (to 4), silver (to 5), and 25mm across = 10p.
  • Question 11

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

 

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

 

Use the key to find out which 7-sided coin is 21mm across.

CORRECT ANSWER
20p
EDDIE SAYS
Follow it through: the coin has several straight edges (to 2), has 7 sides (to 3) and is 21mm across = 20p.
  • Question 12

Here are our British coins:

 

Use the key to find out the answer to the question about these coins:

 

Clue 1 If the coin has several straight edges go to Clue 2
  If the coin is round go to Clue 4
Clue 2 If the coin has 12 sides  £1
  If the coin has 7 sides  go to Clue 3
Clue 3 If the coin is 27mm across 50p
  If the coin is 21mm across 20p
Clue 4 If the coin is all silver in colour go to Clue 5
  If the coin is not all silver in colour go to Clue 6
Clue 5 If the coin is 25mm across 10p
  If the coin is 18mm across 5p
Clue 6 If the coin is bronze in colour go to Clue 7
  If the coin is gold and silver in colour £2 
Clue 7 If the coin is 26mm across 2p
  If the coin is 20mm across 1p

 

Use the key to find out which round coin is round, not silver or bronze but gold & silver in colour.

CORRECT ANSWER
£2
EDDIE SAYS
Follow it through: the coin is round (to 4), is not silver (to 6), but is gold and silver = £2.
---- OR ----

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