Dichotomous Keys and Classification
Presentation
•
Biology
•
7th Grade
•
Medium
Standards-aligned
LESLEY BABE
Used 588+ times
FREE Resource
10 Slides • 10 Questions
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Dichotomous Keys and Classification
Classifying organisms one step at a time
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What is a dichotomous key?
"Dichotomous" means divided in two parts. These help determine what an organism is through a series of choices that lead you to the correct answer
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Multiple Choice
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Let's try one!
Look at the images of the insects.
Start on question 1.
Depending on the answer, go where the question tells you to go.
Stop when your organism has been identified.
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Example one...
What is example A?
Are the wings covered by an exoskeleton? That's a skeleton on the outside.
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Multiple Choice
Is there an exoskeleton on the outside of the wings?
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Keep going until you know what the organism is.
Look at the wings. Are they pointed out from the body or are they toward the rear of the body?
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Multiple Choice
Look at the wings. Are they towards the outside of the body or are they on the back of the body?
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Multiple Choice
What organism is this?
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Look at organism B...
Are the wings covered by an exoskeleton?
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Multiple Choice
Is there an exoskeleton on the outside of the wings?
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The wings are hard so yes to the exoskeleton.
Go to question 2. Look at the shape. Is it round or long?
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Multiple Choice
Is the body shape round or elongated?
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Multiple Choice
What organism is this?
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Look at organism C...
Are the wings covered by an exoskeleton?
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Multiple Choice
Is there an exoskeleton on the outside of the wings?
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Keep going until you know what the organism is.
Look at the wings. Are they pointed out from the body or are they toward the rear of the body?
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Multiple Choice
Look at the wings. Are they towards the outside of the body or are they on the back of the body?
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Multiple Choice
What organism is this?
Dichotomous Keys and Classification
Classifying organisms one step at a time
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