Every science begins with agreement s. We agree to use a specific name for a particular kind of thing. If later, we discover that some characteristic s we thought were universal are not, We may change the name or We may change the description.
Outline Divide the class into four groups.
Ask the class why they answered as they did. Ask the class to speculate as to what circumstances, genetic or environmental, lead to this situation. A method of studying what goes on in the world. To assign a word to a collection of things.