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Grouping Invertebrates 1

In this worksheet, students will test their knowledge of invertebrates by classifying them into different groups using features we can see.

'Grouping Invertebrates 1' worksheet

Key stage:  KS 2

Curriculum topic:   Living Things and Their Habitats

Curriculum subtopic:   Grouping

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Invertebrates are animals without backbones and there are millions of different sorts on our planet. Many have a hard 'shell' on the outside which gives them their shape. They have a soft inside which includes mussels.

 

Scorpion Beetle Mussel

 

Insects are invertebrates which have a hard 'outside', and a soft inside (that means that they go "scrunch, then squish" when you step on one by mistake - yuk!).

 

Fly Moth Earwig

 

Some invertebrates have a soft inside and a soft outside:

 

Slug Worm

 

OK, so it's time to find out more about INVERTEBRATES, what they're like and how they are sorted out into groups.  Let's get sorting!

An invertebrate is an animal which...

scares us

has a backbone

does not have a backbone

Which TWO of these groups do not have backbones?

mollusc

fish

insect

amphibian

Look at these animals. Which group do they belong to?

 

Garden spider Harvestman Scorpion


 

animals with 8 legs

animals with 6 legs

animals which live in the desert

Which group do these animals belong to?

 

Fly Wasp Bee

 

insects with wings

insects with 6 legs

insects with wings and 6 legs

insects with stripes

Which is the best way of telling the difference between a bumble bee and a wasp?

the number of legs

their weight

their hobbies

the pattern of their stripes

All of these animals are molluscs. Have a look at them.

 

Slug Snail Octopus

 

Now pick ONE thing that you think they all have in common.

They cannot swim

They live in the sea

They have no legs

They have scales

What do you think is the main difference between the snail and its relatives, the slug and the octopus? 

legs

shell

Here are two invertebrates you might find in your garden or in the park:

 

Woodlouse Centipede

 

 

Pick THREE statements that you agree with for both animals?

They have more than 8 legs

They have wings

They live in the same habitat

They can swim

Their bodies have lots of segments

  • Question 1

An invertebrate is an animal which...

CORRECT ANSWER
does not have a backbone
EDDIE SAYS
That's right - no backbone = invertebrate.
  • Question 2

Which TWO of these groups do not have backbones?

CORRECT ANSWER
mollusc
insect
EDDIE SAYS
Molluscs are animals without backbones which usually have a shell, like snails, mussels, oysters, etc., and also slugs (they have a really small shell hidden inside their bodies - yes they do!). Insects have a tough outer case called an EXOSKELETON to support their bodies. Meanwhile, fish and amphibians (like frogs) have bones and backbones, and so are VERTEBRATES.
  • Question 3

Look at these animals. Which group do they belong to?

 

Garden spider Harvestman Scorpion


 

CORRECT ANSWER
animals with 8 legs
EDDIE SAYS
Well counted! Yes, it's animals with 8 legs and scientists give them a special name - ARACHNIDS. That's the spiders and scorpions (and also little ones called mites).
  • Question 4

Which group do these animals belong to?

 

Fly Wasp Bee

 

CORRECT ANSWER
insects with wings and 6 legs
EDDIE SAYS
These insects all have wings and 6 legs. Not all insects have wings for example worker ants and earwigs.
  • Question 5

Which is the best way of telling the difference between a bumble bee and a wasp?

CORRECT ANSWER
the pattern of their stripes
EDDIE SAYS
What do you think the stripes mean? It's a danger signal that means "watch out, I've got a sting" and doesn't it work well? It's so successful that harmless insects, like the hoverfly, have developed yellow and black stripes ... but they don't have a sting at all. Bet you wouldn't want to have one land on you though - see, it works!
  • Question 6

All of these animals are molluscs. Have a look at them.

 

Slug Snail Octopus

 

Now pick ONE thing that you think they all have in common.

CORRECT ANSWER
They have no legs
EDDIE SAYS
Molluscs are weird creatures - and so different! None of them have legs; in fact many have a very muscular 'foot' that they use for moving around. Some are highly developed and really clever - the octopus can solve some tricky problems and its 'foot' has developed into eight incredible tentacles which it uses for moving, catching prey and so on.
  • Question 7

What do you think is the main difference between the snail and its relatives, the slug and the octopus? 

CORRECT ANSWER
shell
EDDIE SAYS
Yeah, that's pretty straightforward, isn't it? Snails, mussels, clams, periwinkles, whelks and so on all have shells but there are some molluscs that have done away with their shell.
  • Question 8

Here are two invertebrates you might find in your garden or in the park:

 

Woodlouse Centipede

 

 

Pick THREE statements that you agree with for both animals?

CORRECT ANSWER
They have more than 8 legs
They live in the same habitat
Their bodies have lots of segments
EDDIE SAYS
These animals, the woodlouse and the centipede, are invertebrates that are related because their bodies have a tough exoskeleton on the outside. They have a lot of legs (woodlouse = 14 and centipede = 42), their bodies have lots of segments and you'll often find them under rocks and logs.
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