Our Next Unit of study in physical science is ________________________________

Know List at least 3 things

you know about light.

Want to know Come up with at least 3

questions you want to know

about regarding light?

Learned? We’ll add to this once the

unit is complete.

Can You See Without Light?

Write a Hypothesis? (A statement that you believe to be true)

_______________________________________

______________________________________

Procedure:

1- Observe: covering the top hole while

looking into the box, describe what you

see.

_____________________________________

_____________________________________

2- Now using a flashlight, shine it into the

hole and see if you can describe the item>

_____________________________________

_____________________________________

Drawing Conclusions:

1- Could you see the object inside the box

during step 1? Yes No

Step 2? Yes No

Explain the differences?

We did this activity in class: NO you cannot see without light. Light has to hit something

and bounce into our eyes for us to see it.

Why do Nocturnal animals have such big eyes? To allow light in at night.

Flashlight Experiment:

Below, sketch your partners eye, pay attention to the pupil.

In a lighted room….

In a darkened room.

Perform the activity:

In a sentence, explain what you saw happened.

Explain why it happened?

Your eyes are AMAZING! Let’s look at how they work?...

In a lighted room the pupil gets small because there is plenty of light bouncing into our

eyes.

In a darkened room the pupil gets larger so more light can bounce is as it is darker, that is

when we say our eyes are “adjusting” to the light.

The pupil is small

In the darkened room, they pupil got bigger

When I shined the light, the pupil got small quickly…Cool.

Chapter one:

1. Define: Theory:

2. Today we know light is a form of __________Energy____________ and

it travels in ________Waves________.

3. The kind of energy our eyes see is known as _radiant light____________.

This part is known as ________________Visible light_________________.

(Color the range of “Visible Light”)

Examples of each from slide show:

Gamma Rays : ________Nuclear bombs or in outer space._

X-Rays: ________In DRs. office_____________ (we can

see through skin)

Ultraviolet light ________Hospitals and Tanning beds____

Visible Light: We are learning it now

Infrared light: _________Remote controls_____________

Microwaves: ____microwave ovens and cell phones_____

Radio Waves: _______TV and Radio___________

Chapter Two: Properties of Light:

1. Light is caused by the release of energy from ________Atoms________.

2. Atoms make up all _______matter____________.

When atoms gain _____energy_______, they get “excited”

3. When Atoms are heated, the get excited and give off

___________light______________.

4. Explain how a Light bulb works:

Electrons move across a “filament” in a bulb, the filament gets excited and

begins to glow, giving off light (and heat)

5. What two sources of light are _________Natural_________ and

___________artificial__________.

6. __________Natural________ light examples are

______Lightening_________, _______Stars________ and ____Sun_____.

7. _______Artificial___________ light examples are Candles and

___________fire______________

8. Light can be hot, this is called _____________Incandescent__________

9. Light can be cool, this is called __________Fluorescent_____________

Light

Light is _______radiant_________ Energy.

It moves in the form of ______waves_____

Just review the size of the wave

lengths above. Smaller is more

dangerous

Light moves very fast…Just how fast?

_670 million________ Miles Per Hour

Light travels in a __________straight line__ (do flashlight and note card activity)

Until it hits an object and

is__reflected_____

or __________absorbed.________. Light can be referred to as a wave or as a PHOTON. (See ted

video)

In the picture of the bullet and the apple, how many pictures did

they take in 1 second? _________1 million ______

This scientist can now take pictures much faster, how fast

_____________1 trillion pics per second___________________.

Because of this he is able to take a picture of a ____Photon_____.

(A piece of light, that is moving at 186,000 miles per seconds)

Science Notes: Chapter two: Part two

: Behavior of Light

10: Light travels in a ___________Straight Line______________.

11. Light can pass through objects or _______bounce/reflect_______ off.

When light bounces off a smooth object we say it

_______reflects_________. (Like a mirror)

If light bounces off a “rough” surface, the light _____scattered_____ and

that makes the image blurry.

12. Sometimes light goes through an object, but it slows down and is bent.

We say this is _________refracted___

Materials Affect Light:

13.______transparent ___________ allows light to pass through, without

mixing or bouncing. We can see clearly through the objects.

14. _______translucent_________ allows light to pass through, but mixes it,

blurring the image. We can’t see through these.

15. _______opaque___________ doesn’t allow light to pass through it. It

reflects all light. We cannot see anything through it.

3 Things can happen to light:

1) ____________reflect it________

2) ____________Bend it_________

3) _________absorb it___________

What is “Transmission” of Light?

To cause to pass or to be passed through a space or medium

How light reacts to objects:

1) ______________Transparent____________:

A) Light completely passes through

B) You can see through clearly.

Example is: ______________glass, plastic clear or colored

2) ____________Translucent__________:

A) Light passes through but you cannot see through the

substance, but is not transparent.

Example: _____coffee filter____________

3) __________Opaque____________

A) Light cannot pass through these substances

Example:_________book_________________

4) __________Reflection_________

When light hits the surface and it cannot pass

through.

When light cannot pass through an item it creates a

__________Shadow_____________

When light hits the surface and it cannot pass through, it

bounces off. We call

this a ____________reflection____________________.

The law of _____________reflection______________: States that light will

"reflect" out at the same angle that it hits the object.

Experiment time with mirrors:

Now Light reacting with Mirrors:

_____Convex________ : a lens with surfaces that

curve outward

Draw a picture of you face in a convex mirror:

"Distorted, skinny on part/ squished on anotherr

_________Concave________:, a lens with inward-curving

(concave) surfaces

Draw a picture of your face in a concave mirror.

Upside down

5) __________Refraction_____________

__________symmetry_________ is defined as being made up of the same

parts facing each other.

When light hits a substance of greater density

and it _____slows down_________ and

________Bends_______.

(do penny in the cup activity/pencil in cup/magnifier.)

Colors of Light:

Do Color Chromatography Activity:

Primary Colors of Pigment: ___Cyan___, __Magenta____,

____Yellow____

Primary Colors of Light: ____red____, ____green____,

__blue___

(These colors make all other colors of pigments or light)

Notes:

Light travels in

______Waves________.

In our eyes, our ___cones____

recognize each wavelength as

____colors_____________. What do we know?

Light is _______white_______.

When light is shown through a prism it is ______refracts/bends_____.

When light is “forced” through a prism, each wavelength is bent at

a different angle, creating __________rainbow____________.

(Do the prism activity)

When we do this, we can see a

rainbow. This rainbow is known as

the _______Spectrum__________.

All light can be broken into 7 colors:

We remember this as _r_ _o_ _y_ _g_ _b_ _i_ _v_.

_r_= red

_o_= orange

_y_= yellow

_g_= green

_b_= blue

_i_= indigo

_v_= violet When all colors of the spectrum are mixed

______White______light is created.

Light needs to hit something to be seen.

Some of the colors are

______absorbed________.

_____Absorbed_____= soak in

some of the colors are

________reflected______.

______reflected_____= bounce back.

What colors do we see? The light reflected off of the object is what we see. For

example, an apple is red. White light hits the apple, all

colors are absorbed except the red, which is reflect back to

our eyes.

Taylor wears a black shirt out on a sunny day. Julien wears

a white shirt out on a sunny day. Who will get hotter?

Why?_

White clothes reflect all the colors, so we see white..

Black colors absorb all the colors. The light that is

absorbed gets “changed” to heat, so we get hotter wearing

black. Light and Heat:

Taylor wears a black shirt out on a sunny day. Julien wears a white

shirt out on a sunny day. Who will get hotter?

Why?_________________________________________________

______________________________________________________

_____

Black absorbs all wavelengths

of light and are converted into ___heat_

White reflects all wavelengths

of light keeps you:__cool__

Example of Light and Heat: Pizza Box Solar Ovens: Sunlight (light) hits the ____foil_______ and __reflected_ The sunlight into the box through The cellophane. The light hits the black paper and is ______absorbed_________. This then Changes to ___Heat__________. Causing the S’ more to __melt_______: