Revision puzzles

In this lesson you are going to do some revision.   This time, you are going to use what you have learned to do some puzzles as well as to revise your previous skills.

Individual differences

When you classified living things, you divided them into smaller groups.   The members of the small groups are a lot more similar to each other than they are to other living things.

Grouping animals

For example, animals include snails, ants, bullfrogs, tree frogs, jellyfish, lizards and humans.   These can be divided into two groups.  

Group 1        includes snails, ants and jellyfish.  

Group 2        contains bullfrogs, tree frogs, lizards and humans.  

Group 2 can be divided into three groups.   One group contains the tree frog and the bullfrog because a bullfrog and a tree frog are alike.   They are not very similar to a human or to a lizard.  

As the groups get smaller, the members of each group are becoming more similar.

Within each group, the members have differences as well.   If you think about humans, you'll realise that even though people are all human, people differ a lot.   With careful observations, it is possible to describe these differences.

The next exercise gives you an opportunity to practice observing and describing. Go to Exercise.

Lesson 20 - Revision puzzles