1. How can we tell these aliens apart?

2. We can classify the aliens by their characteristics.
Head shape
Body shape
# of eyes
Hair
Antennae
Spot on body
Etc…

3. Your Challenge Your group will be given 20 aliens to classify.
Choose one general characteristic to categorize your aliens into two large groups. Ex: has ‘abc’ and does not have ‘abc’.
Groups do not have to have the same number of aliens in each.
Record your info on the chart provided.

5. Decide as a Group
After you have completed your two groups, split each group into two new groups.
Choose one characteristic to separate the first group.
Choose one characteristic to separate the second group.
You should have 4 groups when completed.
Continue splitting each group until you can no longer split them into new categories anymore.