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Classification

In this worksheet, students will learn about the scientific classification system.

'Classification' worksheet

Key stage:  KS 3

Curriculum topic:  Biology: Interactions and Interdependencies

Curriculum subtopic:  Relationships in an Ecosystem

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

We share this planet with a vast array of amazingly different organisms.  Sorting them out into groups - why?  Well, first of all, human beings like order - they like things to be sorted out.  Next, as we do this we see our place in all this plethora of life and also learn so much more about the organisms around us.  It was a Swedish scientist, Carl Linnaeus, who started this process off a couple of centuries back.  To start off with, each organism is sorted into its big KINGDOM, like Animals or Plants.  Then, within that Kingdom it's sorted into its PHYLUM, like Vertebrates, and so on down through smaller and smaller groups until you end up with just one type of organism - that's a SPECIES.  We call this process CLASSIFICATION and it works for anything: cars, steam locomotives, road systems and so on.

 

The diagram shows the five kingdoms with some sample organisms:

The animal kingdom is divided into two groups. Vertebrates (with a backbone) and Invertebrates (without a backbone). The diagram below shows further grouping and examples of vertebrates and invertebrates. It is really important that you remember the characteristics of all groups, especially all the vertebrate groups. You will be asked, in tests, to identify what group organisms belong to. The second diagram shows the characteristics of plant groups.

 

 

Arthropods from the invertebrates are even further classified into more groups. The diagram above shows four further groups of arthropods.

What kingdom do mushrooms belong to?

animals

plants

fungi

What kingdom do lobsters belong to?

protoctists

animals

insects

Is this statement true or false?

Vertebrates have no backbones.

true

false

Tick two invertebrate groups.

echinoderms

mammals

molluscs

birds

Give an example of a mollusc.

flatworm

snail

sea urchin

Tick two examples of arthropods.

butterfly

crab

slug

worm

Is this statement true or false?

 

Spiders are insects.

true

false

Is this statement true or false?

 

The difference between mammals and the other vertebrates is that mammals are the only ones that give birth to live young.

true

false

Where can amphibians live?

 

Tick two answers.

in burrows

in nests

on land

in water

Tick two flowering plants.

horse chestnut tree

algae

fern

broad bean

  • Question 1

What kingdom do mushrooms belong to?

CORRECT ANSWER
fungi
EDDIE SAYS
Mushrooms and toadstools are in the Kingdom of Fungi. Once upon a time they were classified as plants, because their cells have cell walls, but it was decided that the key thing that sets plants apart is their ability to photosynthesise, which fungi cannot do, so they were put into their own kingdom.
  • Question 2

What kingdom do lobsters belong to?

CORRECT ANSWER
animals
EDDIE SAYS
Protoctists are things like single-celled organisms, so that certainly doesn't fit a lobster! Insects are a group of animals (so that won't do) and so it turns out that lobsters are in the Animal KIngdom (as opposed to being Plants or Fungi!).
  • Question 3

Is this statement true or false?

Vertebrates have no backbones.

CORRECT ANSWER
false
EDDIE SAYS
Vertebrates, as you'll have learned in KS2, are animals with backbones, like YOU!
  • Question 4

Tick two invertebrate groups.

CORRECT ANSWER
echinoderms
molluscs
EDDIE SAYS
OK, so by now you'll probably have forgotten what echinoderms are! So, let's do it the other way around: which ones are NOT invertebrates? Clearly, mammals and birds. So you can answer this by elimination, but to be honest it's better to KNOW! I guess you'll know that molluscs are animals like snails, slugs, mussels, octopuses and so on - invertebrates. Well, the echinoderms (meaning 'spiny skin') are animals like starfish and sea urchins - invertebrates.
  • Question 5

Give an example of a mollusc.

CORRECT ANSWER
snail
EDDIE SAYS
Molluscs are all around us, but they're most commonly found in the sea: sea slugs, oysters, squid, whelks and so on. The ones you're probably familiar with are the terrestrial ones (found on land): snails and slugs.
  • Question 6

Tick two examples of arthropods.

CORRECT ANSWER
butterfly
crab
EDDIE SAYS
Arthropods are animals with 'jointed legs' and an exoskeleton. Looking at the list, that only applies to the butterfly (an insect-type of arthropod) and the crab (a crustacean-type of arthropod).
  • Question 7

Is this statement true or false?

 

Spiders are insects.

CORRECT ANSWER
false
EDDIE SAYS
Spiders are arachnids; arachnids have four pairs of legs, whereas insects have three. Spiders' other 8-legged arthropod relatives include scorpions and ticks.
  • Question 8

Is this statement true or false?

 

The difference between mammals and the other vertebrates is that mammals are the only ones that give birth to live young.

CORRECT ANSWER
true
EDDIE SAYS
OK, so there are always going to be exceptions, but mammals mostly give birth to live young which they suckle with milk. The weird and wonderful duck-billed platypus and spiny anteater of Australia are mammals which lay eggs (hang-overs from an earlier age of mammals) and, then again, a few other vertebrates produce live young, like some snakes.
  • Question 9

Where can amphibians live?

 

Tick two answers.

CORRECT ANSWER
on land
in water
EDDIE SAYS
Amphibians don't tend to make nests and rarely live in burrows, but they are generally found on land (in damp places like ditches, marshy ground or in the log pile at the bottom of the garden). Also, of course, in water, which they all have to go back to to breed. Newts live mainly in water but frogs live mainly on land.
  • Question 10

Tick two flowering plants.

CORRECT ANSWER
horse chestnut tree
broad bean
EDDIE SAYS
Algae (like seaweeds) and ferns (like bracken) don't flower and they use spores to reproduce themselves. Horse chestnut trees (often known as conker trees) and broad beans are two of many examples of flowering plants.
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