
Vision is
the most extraordinary of the human
senses. We often take for granted the importance
of the visual system in our everyday life. It is the
function of our eyes to convert visible light into
electro-chemical impulses to be processed by the
brain. Simply, the eye functions much like that of
a camera. The colored iris acts like a shutter,
adjusting to regulate the amount of light entering.
It is the function of the clear cornea and crystalline
lens to aim or focus light rays onto a "film-like"
tissue termed the retina. The brain is the
Photomat. It takes the information gathered by
the eye and processes this information into an understandable, recognizable
picture.
All higher organisms are equipped with "visual sensors" to aid in basic
life functions. The
human visual system has evolved to include fine detail recognition, rapid
detection of motion,
advanced color discrimination and single binocular vision to provide information
in our three
dimensional world
Anatomy of the Eye
Parts of the Eye
Cornea -- the clear front window of the eye. The cornea transmits and focuses
light into the eye.
Iris -- the colored part of the eye. The iris helps regulate the amount
of light that enters the eye.
Pupil -- the dark center in the middle of the iris. The pupil determines
how much light is let into the eye. It changes
sizes to accommodate for the amount of light that is available.
Lens -- the transparent structure inside the eye that focuses light rays
onto the retina.
Retina -- the nerve layer that lines the back of the eye. The retina senses
light and creates impulses that are sent
through the optic nerve to the brain.
Macula -- a small area in the retina that contains special light-sensitive
cells. The macula allows us to see fine details
clearly.
Optic Nerve -- the nerve that connects the eye to the brain. The optic
nerve carries the impulses formed by the retina
to the brain, which interprets them as images.
Vitreous -- the clear, jelly-like substance that fills the middle of the
eye.
Copyright © 1996-2000 American Academy of Ophthalmology

Structure and Function in Living Systems
The anatomy and physiology of plants and animals illustrate
the complementary nature of structure and function.
As a basis for understanding this concept, students know:
Plants and animals have levels of organization for structure and function,
including cells, tissues, organs, organ systems, and the whole organism.
Organ systems function because of the contributions of individual organs,
tissues, and cells. The failure of any part can affect the entire system.
How to relate the structures of the eye and ear to their functions.
Physical Principles in Living Systems (Physical Science)
6. Physical principles underlie biological structures and functions.
As a basis for understanding this concept, students know:
a. visible light is a small band within a very broad electromagnetic
spectrum.
b. for an object to be seen, light emitted by or scattered from it
must enter the eye.
c. light travels in straight lines except when the medium it travels
through changes.
d. how simple lenses are used in a magnifying glass, the eye, camera,
telescope, and microscope.
e. white light is a mixture of many wavelengths (colors), and that
retinal cells react differently with different wavelengths.
f. light interacts with matter by transmission (including refraction),
absorption, or scattering (including reflection).
g. the angle of reflection of a light beam is equal to the angle of
incidence.
h. how to compare joints in the body (wrist, shoulder, thigh) with
structures used in machines and simple devices (hinge, ball-and-socket,
and sliding joints).
i. how levers confer mechanical advantage and how the application of
this principle applies to the musculoskeletal system.
j. contractions of the heart generate blood pressure, and heart valves
prevent backflow of blood in the circulatory system.
Investigation and Experimentation
7. Scientific progress is made by asking meaningful questions
and conducting careful investigations.
As a basis for understanding this concept, and to address the content
the other three strands, students should develop their own questions and
perform investigations. Students will:
a. select and use appropriate tools and technology (including calculators,
computers, balances, spring scales, microscopes, and binoculars) to perform
tests, collect data, and display data.
b. utilize a variety of print and electronic resources (including the
World Wide Web) to collect information as evidence as part of a research
project.
c. communicate the logical connection among hypothesis, science concepts,
tests conducted, data collected, and conclusions drawn from the scientific
evidence.
d. construct scale models, maps and appropriately labeled diagrams
to communicate scientific knowledge (e.g., motion of Earth's plates and
cell structure).
e. communicate the steps and results from an investigation in written
reports and verbal presentations.
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Insert your learning objectives
here. For example:
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After viewing an animation of
continental movement on a laser disk, students will be able to arrange
the fit of the continents with continental puzzle pieces.
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After analyzing information from
an Encarta CD, students will be able to compare the distribution of fossils,
rock types and ancient climatic zones on different continents as evidence
for plate tectonics by fitting puzzle pieces marked by these special features.
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Students will be able to draw
a diagram of the earthâs layers.
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After collecting information from
The Earth CD, students will be able to locate earthquakes, volcanoes and
mid ocean ridges as evidence for plate tectonics.
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After viewing a laser disc geology
chapter, students will be able to pass a true/false quiz on lithospheric
plates and layers of the earth.
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Students will be able to identify
the major geologic events that result from plate motions in a Power Point
multimedia presentation.
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Students will be able to present
their findings on the sixth grade plate tectonics and Earthâs structure
standards in a Power Point multimedia presentation to an audience of peers
and adults, including the World Geologic Society.
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Students will be able to write,
edit and revise their findings on the sixth grade plate tectonics and Earthâs
structure standards using correct grammar, spelling and punctuation.
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Insert brief summaries of
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online resources in your text and insert links to activities on your student
lesson web site.
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Eye%20Anatomy Enabling
Activity(ies)
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Culminating
Activity
Students will perform a dissection
of an eye and identify and properly label and diagram each part and be
able to describe the function.
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Assessment
Lesson 1 quiz
This is the quiz for lesson
1, do your best. Choose the correct answer
from the pull down menus.
When you have completed and reviewed
your answers, press the 'Turn
it in!' button to submit your test and have
it graded.
First name
Last name
Question
Answer
The cell makes up ...?
Cells are the
simplest unit capable of independant existence.
The cell is the basic
unit of life.
The average cell is
made up mostly of...?
Most cells do not contain
...?
By elemental composition
cells are made up mainly of ...?
Eukaryotes are __________
than prokaryotes.
The DNA of eukaryotes
is trapped in the Nucleus.
Eukaryote are __ times
larger than prokaryotes.
Both types of cells
have...?
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for the culminating activity or a link to your rubric or test document
file.
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Results
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post-test, and culminating assessment data.
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Web
Resources & Supplementary Materials
Introductory Activity
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for this activity here. Also link supplementary materials such as PDF files
and /or document files.
Enabling Activity
List and link the web resources
for your learning activity(ies) here. Also link supplementary materials
such as PDF files and /or document files.
Culminating Activity
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