Study Hall

Do homework. Read silently. Do not talk.

Sharpen your pencils and go to your assigned seat

Warm-Up

Without moving your head, look up, Look down, Look all around,

In your notebook, explain how can you do this with your eye?

Explanation

• You have 6 muscles attached to your eyeball which allows you to move your eye so you can look in different directions without moving your head.

1st Block:Visible Light Spectrum– “ROY G BIV”

• R-red • O-orange • Y-yellow • G-green • B-blue • I-indigo • V-violet

• Human eyes only respond to “visible light wavelengths” within the electromagnetic spectrum

Write these notes!

Reflected Light: Introduction Video

• Discovery Ed video “ Reflected Light” (1:08 minutes)

Reflected Light - Notes

• Light can be absorbed or reflected. • Absorbed light = the colors we do not see • Reflected light = the colors we see

Write these notes!

Reflected Light - Notes

• White light = contains all the colors (ROYGBIV)

• White light shining on an apple:The red light bounces off the apple and enters

our eyes while all the other colors are absorbed

Write these notes!

Reflected Light - Notes

• White objects reflect all the colors (ROYGBIV) • wear light colored clothing in the summer, we feel

cooler (reflecting more)

• Black light reflects no color, it absorbs all the colors of light

• wear dark clothing in the summer, we feel hotter (absorbing more)

Write these notes!

(2nd & 3rd Block) Now it’s your turn….

• Pick five items in the classroom and for each item list what color is being reflected and what colors are being absorbed.

Ms. Maas’ Five!

1. Black Lab Table Tops = it is absorbing all colors (ROYGBIV) and reflecting black (we see)2. Yellow Textbooks = reflecting yellow (we see) and absorbing ROGBIV3. Blue Chairs = reflecting blue (we see) and absorbing ROYGIV4. Green Plant = reflecting green (we see) and absorbing ROYBIV5. American Flag Red Stripes = reflecting red (we see) and absorbing OYGBIV

Light Behaves Differently

• Some materials scatter light; • Some materials refract (bend) the

light.

Write these notes!

Refracted Light: Introduction Video

• Discovery Ed video Refracted Light (1:44 minutes)

Refracted Light - Notes

• colors of the visible spectrum travel at their own unique speed.

• Light travels slower through water and glass than it does through air

Write these notes!

4th Block: Refracted Light - Notes

• White light through a glass prism =light refracted (or bent) and separated into the visible spectrum (ROYGBIV).

• Colors refract (bend) at different angles because each color travels at different speeds.

• Violet is bent the most and red is bent the least

Write these notes!

Refracted Light - Notes

• White light through a prism = all seven colors refracted

• The refracted spectrum can be bent again, with a second prism = back to white light!

Write these notes!

In Interactive Notebooks…

• In your Table of Contents, add a new entry:

“Parts of the Eye : Notes”

Number the entry

Go to this page inside your notebook and title the page “Parts of the Eye: Notes” and number the page

The Human Eye

• Discovery Ed video “The Human Eye” (2:17 minutes)

The Human Eye: Parts

• The Human Eye:• Cornea• Pupil• Lens• Retina• Optic Nerve• Brain

Your EYE!

• If you reach up and feel around your eye, you’ll feel the bone of your skull.

• There’s fat surrounding your eyeball to keep it from bumping up against the bone and getting bruised.

• In the cow’s eye dissection, we cut away all the fat and muscle so that we can see the eyeball.

Visible parts of the human eye• Pupil- the dark center• Iris- the colored part (blue, green, brown,

hazel)• Scalera- white part

Cow Eye Video Dissection

• Humans = 6 muscles controlling our eyeball (can look in different directions without moving our heads)

• Cows = 4 muscles controlling their eyeball (they can’t roll their eyes like you can)

• So cows have to turn their heads to look around!

Cow Eye Dissection Video

• If the video makes you uncomfortable, please simply put your head down on your desk.

• While we are watching, please act as scientists.

• This means, do not scream and shout, simply put your head down if something makes you uncomfortable.

• http://www.exploratorium.edu/learning_studio/cow_eye/step01.html

Parts of the Eye Activity

• Glue this handout into your notebook• Circle the really important ones and number

them• #1 Cornea• #2 Pupil & Iris• #3 Lens• #4 Retina• #5 Optic Nerve

Graphic Organizer

• Draw a graphic organizer that looks like this in your notebook:

• Follow along as we list the order in which light passes into your eye

Cornea

Pupil-Iris

Lens

Retina

Optical Nerve

Brain

Light