Describing using a key

You have been using keys to classify and list features.   As well, keys can be used to describe animals.   Look at some examples.  

Go through the next three examples about describing invertebrates.

Describing insects

1      Start at insects .   Go up to the classifying feature above it, 3 pairs of legs .   Therefore, an insect has three pairs of legs.  

2      Follow the straight lines upwards to the next feature, legs .   You already know that an ant has legs, so you can keep going upwards along the lines.  

3      You'll reach the top group, invertebrate animals .  

From the key, what features do insects have?

Now you can write a sentence describing insects.   The description contains the features mentioned above.   Remember to write it like a definition.

Describing molluscs

From the key, what features should be included in a description of molluscs?

Now, write one or two sentences describing molluscs.

Describing crustaceans and cnidarians

Use the key to describe crustaceans and cnidarians.

Description of crustaceans

Description of cnidarians

You'll use the invertebrate key from this lesson in the next exercise. Go to Exercise.

End of lesson 14- Invertebrates