Eighth graders use a dichotomous key to identify unknown fictitious organisms. They work individually during this exercise. The task is designed to take students approximately 15-25 minutes to complete.
8th Science 5 Views 16 Downloads
Use of Dichotomous Keys to Identify Stream Organisms
What kind of organisms are living in the stream? After an explanation on how to use a dichotomous key, groups of three to four use the keys to identify macroinvertebrates from a local freshwater stream. Using the the concept of Stream...
8th - 12th Science
Determining Stream Health by the Diversity and Types of Benthic Organisms
How diverse are the benthic organisms found in local streams? Using the information learned in previous lessons on identification of macroinvertebrates and on calculating stream index values, groups determine the health of local streams....
8th - 12th Science
Introducing the Use of Dichotomous Keys to Students
Young scholars are introduced to the use of dichotomous keys as a simple means of beginning scientific observations in nature. They comprehend how to use a dichotomous key. Students distinguish characteristics of a group of organisms....
6th - 8th Science
Reebops: A “Model” Organism for Teaching Genetic Concepts
In a sweet simulation, junior geneticists examine the chromosomes of a fictitious Reebop marshmallow animal, combine chromosomes to produce offspring, and then make a model of the resulting Reebop baby. Phenotypes include number of...
6th - 12th Science
What Does the Pancreas Do?
We are all born with one, but how many people actually know what the pancreas does? Follow along with a short video as it examines the important role this often-overlooked organ plays in digesting food and maintaining healthy blood-sugar...
3 mins 7th - 12th Science CCSS: Adaptable
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