Warm up (3 minutes)
1. Pick up a warm up
2. Pick up the student work from the front table
3. Pick up your binder in the filing cabinet
4. Complete the warm up
5. Secure all handouts in your binder
1. In yesterday’s lesson about Galapagos island
finches, what characteristic of the birds CHANGED
when there was a drought?
2. Compare the two finch species in the image below.
Which bird do you think is better adapted to eat
seeds? Why?
“Your Future is in Your hands”
www.BDCAle.wordpress.com
Living Environment:
Nature’s Sustainable Design
FOCUS QUESTION: How can natural selection lead to
changes in the populations of finch species?
Topic 5.7
Today’s Objective:
Beaks of Finches Lab
Today’s Plan:
1.
2.
3.
4.
Warm Up (3 min)
Simulation Lab (40 min)
Data Analysis (10 min)
Exit Slip (5 min)
Investigate some different
characteristics of the beaks of
finches through a simulation in
order to see how they result in
natural selection.
2
Introduction and Pre-Lab Questions
• Answer the FIVE PRE-LAB questions
Predict what type of seed or food your beak
would be best adapted for eating. Explain your
answer.
Beaks of Finches Introduction
Procedure
1. PAY ATTENTION TO ALL DIRECTIONS BOTH WRITTEN
AND VERBAL!!
2. Your goal for each trial in each round is to gather as
many seeds as you can in 30 seconds. You may only
grab one seed at a time with your beak (NO HANDS!),
and if the seed drops on its way to the stomach, it
does not count. BE HONEST!
3. Each round has two trials. At the end of each round
calculate the average seeds gathered using the
equation below. If necessary, round to the nearest
whole seed
Round 1- Feeding on Small Seeds with
No Competition
Class Data
After Round 1
# of Finches That Collected
Min. Seeds
# of Finches That Did Not Collect Min.
Seeds
8
3
• What patterns do we see in the beaks that have
the best fitness?
• What patterns do we see in the beaks that have
the worst fitness?
Round 2- Feeding with Competition
Class Data
# of Finches That Collected
Min. Seeds
# of Finches That Did Not Collect Min.
Seeds
After Round 1
8
3
After Round 2
7
4
• What patterns do we see in the beaks that have
the best fitness?
• What patterns do we see in the beaks that have
the worst fitness?
IF YOUR BEAK DID NOT SURVIVE, YOU MUST NOW
MOVE TO A NEW ISLAND WITH LARGE SEEDS
Round 3- Feeding with Competition and
Possible Migration
Class Data
# of Finches That Collected
Min. Seeds
# of Finches That Did Not Collect Min.
Seeds
After Round 1
8
3
After Round 2
7
After Round 3
Small:6
Small:2
Large:0
Large:4
• What patterns do we see in the beaks that have
the best fitness?
• What patterns do we see in the beaks that have
the worst fitness?
Analysis Questions
• Directions: Use the remainder of class to answer
the analysis questions. If you need help, first ask
your partner. Then you may ask a teacher for help.
Why do you think that the Galapagos is able to
support so many different species of finches?
Explain your answer using specific information
from the image below.
“Your Future is in Your hands”
www.BDCAle.wordpress.com
Living Environment:
Nature’s Sustainable Design
Announcements
• BEAKS OF FINCHES LAB DUE NEXT FRIDAY
(April 24)
• 6.5.2 Natural Selection Labs are due DUE
TODAY!
15
Exit Slip (5 minutes)
1. Return to your assigned seat
2. Complete the exit slip
3. Clean up your workstation
4. Secure all handouts in your binder
5. Put your binder away.
1. Design a bird beak that would be welladapted to large, tough seeds in the image
below. Sketch your beak and explain what
traits make it well-adapted.