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Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)

Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Aim: How can we identify biotic factors in an ecosystem? (Dichotomous keys)
Product Description
This lesson teaches students how to use dichotomous keys. Students are first introduced to dichotomous keys in the simplest way possible. They pretend to be aliens, who must use a dichotomous key to name four simple shapes. Next they must use a dichotomous key to name six celebrities. Then they do an interactive online flash activity in which they use a dichotomous key to name bugs. Finally, they use a dichotomous key to name aliens. This activity is one that is found all over the internet. The only change I made is that I differentiated the aliens by letters instead of numbers. I made this alteration because I found that students were sometimes confused about whether they were supposed to start at step 1 (correct) or at the step of the alien’s number (at step 4 for alien 4, for example.) As an extension activity, I challenge students to write their own dichotomous keys for a number of sharks.
Zip file contains: 1.Powerpoint 2.PDF, to guarantee formatting and for easy printing, 3.Word document, to make it easier to edit.
Document is a conglomeration of my original material and material from other sources. Price reflects this. I have made a good-faith effort to include everything non-original in the free preview download.

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Total Pages
11 pages
Answer Key
Not Included
Teaching Duration
45 minutes
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Grace Pokela

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