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Grouping Invertebrates 2

In this worksheet, students will practise grouping invertebrates.

'Grouping Invertebrates 2' worksheet

Key stage:  KS 2

Curriculum topic:   Living Things and Their Habitats

Curriculum subtopic:   Grouping

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

When you were younger, you may have learned about a group of organisms called minibeasts. Animals commonly called minibeasts include caterpillars, worms and spiders.

 

Minibeasts are actually called invertebrates by scientists. Many invertebrates, like spiders and insects, all have a tough outer case to support their bodies (instead of a backbone, like we have). This case is called an exoskeleton.

 

From now on, we will no longer use the term minibeasts, instead we will call them by their proper scientific name: INVERTEBRATES.

 

Invertebrates get around in all sorts of ways. They can: fly, slither, swim and walk. Let's have a closer look.

How many legs does this snail have?

Snail

more than eight

eight

six

zero

Bees, like this one, and woodlice are both invertebrates.

Name ONE feature from the list that this bee shares with the woodlouse?

 

Bee

the same number of legs

wings

an exoskeleton

a sting

Butterflies are insects.

How many legs does this butterfly have?

 

Butterfly

more than eight

eight

six

zero

This spider is an invertebrate, but is it an insect?

 

Tarantula

yes

no

This woodlouse is a crustacean.

Why is a woodlouse not an insect?

 

Woodlouse

It has an exoskeleton.

It doesn't have six legs.

Which animal is this slug most closely related to?

Slug

an earthworm

a bee

a caterpillar

a snail

Is this earwig an insect or a spider?

 

Earwig

an insect

a spider

Here is a picture of a centipede.

Look at it carefully and from the features you can see choose the animal from the list that you think it is most likely to be related to.

 

Centipede

 

Quick clue: centipedes are arthropods.

the snail

the slug

the earthworm

the spider

This earthworm and the snail are both invertebrates.

What features do the snail and the earthworm share?

 

Earthworm

no legs

a segmented body

an exoskeleton

Have a close look at this animal.  Do you think it is an insect?

yes

no

  • Question 1

How many legs does this snail have?

Snail

CORRECT ANSWER
zero
EDDIE SAYS
Snails slither on what is known as a muscular foot - they have no legs as such. They leave behind a slimy trail, which is the slime they use to make the surface beneath them slippery enough to move on.
  • Question 2

Bees, like this one, and woodlice are both invertebrates.

Name ONE feature from the list that this bee shares with the woodlouse?

 

Bee

CORRECT ANSWER
an exoskeleton
EDDIE SAYS
Many invertebrates (especially things like insects, crabs, scorpions, etc.) have a hard outer case called an exoskeleton. Sometimes you might hear the exoskeleton called a shell, but in science we like to be accurate and so 'shell' is not a very good word as it's easy to get mixed up with a snail's 'shell', which is completely different!
Bees are insects. Insects usually move around by flying or walking, but some can swim. All insects have six legs.
  • Question 3

Butterflies are insects.

How many legs does this butterfly have?

 

Butterfly

CORRECT ANSWER
six
EDDIE SAYS
Butterflies are insects and we know that insects have six legs.
  • Question 4

This spider is an invertebrate, but is it an insect?

 

Tarantula

CORRECT ANSWER
no
EDDIE SAYS
Spiders have eight legs, not six. Spiders are not insects, scientists call them arachnids (ar - rack - nids).
If you count the legs on this tarantula, it looks like it has ten legs. However, the two 'legs' at the very front are actually its feelers, which it uses for feeding. A handy tip to remember is that ALL spiders have eight legs (as do their relatives, the scorpions).
  • Question 5

This woodlouse is a crustacean.

Why is a woodlouse not an insect?

 

Woodlouse

CORRECT ANSWER
It doesn't have six legs.
EDDIE SAYS
Woodlice have 14 legs!
Did you know that woodlice technically belong to the same family as crabs and lobsters? I'm told that they don't taste as nice, though!
  • Question 6

Which animal is this slug most closely related to?

Slug

CORRECT ANSWER
a snail
EDDIE SAYS
Slugs seem like snails without shells, but in fact they're different and just developed like that over time - some of their cousins live in the sea and swim really well! Slugs do have the remains of a shell but it is a tiny remnant that is found inside their body.
  • Question 7

Is this earwig an insect or a spider?

 

Earwig

CORRECT ANSWER
an insect
EDDIE SAYS
Earwigs are insects, they have six legs.
  • Question 8

Here is a picture of a centipede.

Look at it carefully and from the features you can see choose the animal from the list that you think it is most likely to be related to.

 

Centipede

 

Quick clue: centipedes are arthropods.

CORRECT ANSWER
the spider
EDDIE SAYS
Centipedes and millipedes have a tough exoskeleton, just like insects, spiders and crustaceans (like that woodlouse). That's why their closest relative in the list is the spider. They have loads more legs, though, so they are in a different group (rather like a 'family'). Snails and slugs have no legs (they are in the mollusc group) and the earthworm is ... a worm!
  • Question 9

This earthworm and the snail are both invertebrates.

What features do the snail and the earthworm share?

 

Earthworm

CORRECT ANSWER
no legs
EDDIE SAYS
Earthworms, like this one, are examples of segmented worms. If you look at the picture closely you can see the segments forming rings around the worm's body.
  • Question 10

Have a close look at this animal.  Do you think it is an insect?

CORRECT ANSWER
yes
EDDIE SAYS
In fact, the picture shows a stick insect. Bet you counted up the legs to see! The clue is in the name I suppose, but also because, like all insects, sticky here has six legs.
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