Today's main ecology assignment is going to be using one of several online keys to discover the identity of one of two of the conifers growing behind the school.
One conifer is a full, bushy tree at the top of the hill near the back. The other grows in a row of scraggly trees off to the right. Pick one, and let's get started.
1. Choose a dichotomous key. Here's the one we looked at Friday. This one has pictures. This one is more specific, but has no pictures.
2. At each step of the key, write down a sentence that describes the choice you made for your tree. For instance, "The tree has needles 2-3 inches long." If you need a ruler, I can provide one. If you have trouble finding any part of the tree, talk to me. One of the trees has no female cones, that's okay, ask me about it if it's a problem.
3. Find the identity of your tree and record it.
The next assignment will be to create a dichotomous key for 8 plants! This is similar to what we did Friday, only this time I want to make sure you ask questions the same way a dichotomous key would. "Does this plant have round or pointed tips on its leaves?" is a good example. Creating a list of each plant's features is not enough, it must be in the form of a key. Take time with this!
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4 comments:
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