GIZMOS Student Exploration Natural
Selection 1 Brandon Trigg
Name: ______________________________________ Date: ________________________
Student Exploration: Natural Selection
Vocabulary: biological evolution, camouflage, Industrial Revolution, lichen, morph, natural
selection, peppered moth
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
The peppered moth (Biston betularia) is a common moth
found in Europe, Asia, and North America. It is commonly
found in two forms, or morphs: a dark morph and a light,
speckled morph. Birds are a frequent predator of the
peppered moth.
m
er as
1. Which morph do you think would be easier to see on a
co
eH w
dark tree trunk? _The light colored
o.
rs e one______________________________
ou urc
2. Which morph do you think would be easier to see on a
o
light tree trunk? The dark colored
aC s
vi y re
one._______________________________
Gizmo Warm-up
ed d
The Natural Selection Gizmo™ allows you to play the role of
ar stu
a bird feeding on peppered moths. The initial population of
40 moths is scattered over 20 tree trunks. Click on moths to
capture them. Click the Next tree button (or the spacebar
on your keyboard) to advance to the next tree.
is
Th
1. Check that LIGHT TREES is selected. Click Play ( ),
and hunt moths for one year.
A. How many dark moths did you capture?
sh
__8_____
How many moths can you find?
B. How many light moths did you capture?
_0______
This study source was downloaded by 100000828331062 from CourseHero.com on 07-21-2021 11:55:08 GMT -05:00
https://www.coursehero.com/file/35035583/Student-Exploration-Natural-Selection-1Brandon-Triggdoc/
, C. Camouflage is coloring or patterns that help an organism to blend in with the
background. Which type of moth is better camouflaged on light bark? _The light
colored one can hide easier.___________
2. If a forest contained mostly light-colored trees, which type of moth would you expect to be
most common? __I would think the light ones would be more
common.__________________________________________________________
Get the Gizmo ready:
Activity A:
Click Reset ( ).
Light trees
Check that the LIGHT TREES tab is selected.
m
er as
co
Introduction: Before the 19th century in England, the air was very clean. The bark on trees was
eH w
usually light in color. Abundant lichens growing on tree trunks also lightened their appearance.
o.
Question: How does the color of a peppered moth affect survival?
rs e
ou urc
1. Predict: Over time, what will to happen to the populations of light and dark moths on light
trees? _The light ones will increase and the dark ones will
o
decrease._________________________________________________________________
aC s
vi y re
__
2. Experiment: Click Play and hunt peppered moths on light tree trunks for five years. In each
ed d
year, try to capture as many moths as you can. Note: You can use the spacebar on your
ar stu
keyboard to quickly advance to the next tree.
After 5 years, select the TABLE tab and record the percentages of each moth type. (Note:
The table shows current populations of each moth, not the number of captured moths.)
is
Th
Year Dark moths Light moths
0 50 50
1 35 65
sh
2 17 83
3 0 100
4 0 100
5 0 100
This study source was downloaded by 100000828331062 from CourseHero.com on 07-21-2021 11:55:08 GMT -05:00
https://www.coursehero.com/file/35035583/Student-Exploration-Natural-Selection-1Brandon-Triggdoc/
Selection 1 Brandon Trigg
Name: ______________________________________ Date: ________________________
Student Exploration: Natural Selection
Vocabulary: biological evolution, camouflage, Industrial Revolution, lichen, morph, natural
selection, peppered moth
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
The peppered moth (Biston betularia) is a common moth
found in Europe, Asia, and North America. It is commonly
found in two forms, or morphs: a dark morph and a light,
speckled morph. Birds are a frequent predator of the
peppered moth.
m
er as
1. Which morph do you think would be easier to see on a
co
eH w
dark tree trunk? _The light colored
o.
rs e one______________________________
ou urc
2. Which morph do you think would be easier to see on a
o
light tree trunk? The dark colored
aC s
vi y re
one._______________________________
Gizmo Warm-up
ed d
The Natural Selection Gizmo™ allows you to play the role of
ar stu
a bird feeding on peppered moths. The initial population of
40 moths is scattered over 20 tree trunks. Click on moths to
capture them. Click the Next tree button (or the spacebar
on your keyboard) to advance to the next tree.
is
Th
1. Check that LIGHT TREES is selected. Click Play ( ),
and hunt moths for one year.
A. How many dark moths did you capture?
sh
__8_____
How many moths can you find?
B. How many light moths did you capture?
_0______
This study source was downloaded by 100000828331062 from CourseHero.com on 07-21-2021 11:55:08 GMT -05:00
https://www.coursehero.com/file/35035583/Student-Exploration-Natural-Selection-1Brandon-Triggdoc/
, C. Camouflage is coloring or patterns that help an organism to blend in with the
background. Which type of moth is better camouflaged on light bark? _The light
colored one can hide easier.___________
2. If a forest contained mostly light-colored trees, which type of moth would you expect to be
most common? __I would think the light ones would be more
common.__________________________________________________________
Get the Gizmo ready:
Activity A:
Click Reset ( ).
Light trees
Check that the LIGHT TREES tab is selected.
m
er as
co
Introduction: Before the 19th century in England, the air was very clean. The bark on trees was
eH w
usually light in color. Abundant lichens growing on tree trunks also lightened their appearance.
o.
Question: How does the color of a peppered moth affect survival?
rs e
ou urc
1. Predict: Over time, what will to happen to the populations of light and dark moths on light
trees? _The light ones will increase and the dark ones will
o
decrease._________________________________________________________________
aC s
vi y re
__
2. Experiment: Click Play and hunt peppered moths on light tree trunks for five years. In each
ed d
year, try to capture as many moths as you can. Note: You can use the spacebar on your
ar stu
keyboard to quickly advance to the next tree.
After 5 years, select the TABLE tab and record the percentages of each moth type. (Note:
The table shows current populations of each moth, not the number of captured moths.)
is
Th
Year Dark moths Light moths
0 50 50
1 35 65
sh
2 17 83
3 0 100
4 0 100
5 0 100
This study source was downloaded by 100000828331062 from CourseHero.com on 07-21-2021 11:55:08 GMT -05:00
https://www.coursehero.com/file/35035583/Student-Exploration-Natural-Selection-1Brandon-Triggdoc/
