Colours in Grade 8 Science!!!

Today in Science we talked about colour to review and practice for our test sometime in Feburary!
 We talked about Primary,Secondary and Complimentary colours.

The three Primary Colours are Red,Green and Blue.
If you mix two together you get a Seconday Colour.

The Secondary colours are Cyan,Magenta and Yellow.
Cyan is made of green and blue, missing red.
Magenta is made of red and blue,missing green
Yellow is made of red and green,missing yellow.

We are also talking about Colour Filters,
(ex)Start with a red filter, followed by a green filter.
The green filter only transmits green light...
But no green light gets through..
the light will appear black!!
We also did practice with white boards on Colours and Objects.

Solve this: What happens when a red object is hit by a green light?

reflexing clours

hello!, today we are talking about colours reflexing off of another colour and makes a diffrent colour.

today in Science we are contuining our notes about colors.

Complimentar Colors:

- A secondary colour and a primary colour and
create white light when mixed together.

-Red+Cyan = white light

-Green+ Magenta

-Blue  +  Yellow



Example #1


Example #2:

If a red onject is hit by green light it creates yellow light

How We See Colour

Today in science class we reviewed are How We See Colour - Ted ed video. In this video it talked about how your eye's see colour, it explains that you only see three colours, red, green, and blue. here is the Ted ed videos we watched.

 

How We See Color

Green and red light mix to form yellow because light is a wave and two different frequency shouldn't interact with another.

Light perception happens in a paper thin layer of cells called the retina.

Light detecting cells are cones and rods.

 You cant see colors in the dark because the rod cells in your retina take over in low light.

The first step to understanding the phenomenon of color is to think about it as a wave.

We call the repetitive motion of a wave a periodic motion.

When you are measuring the period of a wave you are measuring how long it takes for a wave to go through a full range of motion.

White objects will reflect all colors of light and black objects will absorb them.



 

Color spectrem (2015) Uploaded by windows. Available online @ http://msdn.microsoft.com/en-us/library/windows/desktop/dd372201(v=vs.85).aspx













 

 

TODAY IN SCIENCE

 

 

 

 

 

i was picked to blog today i wish i was'nt but ill live.

 

 

 

 

 

we also got a PRIZE!!!!!!for getting 2000 veiws on our blog, it is sticker and a movie.

 

 

 

 

so keep coming to our blog so we can have another prize.

 

 

 

 

we watched a video on forms of light.

 

 

 

 

 

 

 

 

 

 

 

	bioluminesceence	incandescence	flurescence	phosphorescence	chemilominescence
How it works	- created by a chemical   -chemical energy is turned into light energy	-created by high temperature	-created by absorbing uv light energy   -needs constant energy	-absorbing light energy   -keeps giving off light after energy is taken away	-created by a chemical reaction   -two chemicals mixed together makes it glow
Energy source
Heat created		-about 4600 degrees f
Life span		-1,000 to 2,000 hours	-10,000 hours	-3 to 4 hours

 

 

 

 

 



MAY THE LIGHT BE WITH YOU !!!!!!!

Today in our science class we are talking about Fluorescence, Phosphorescence and Chemiluminescence lights.

FLUORESCENCE
- The creation and emission of light by absorbing UV light energy from another object.
- Needs consistent enrgy to work.
(ex) Fluorescent light bulbs.

PHOSPHORESCENCE
- The creation and emission of light by ABSORBING LIGHT ENERGY from another object.
- TAKES TIME
- Does not give off light right away.
- Keeps giving light when energy source is taken away.
(ex) Glow-in-the-dark items.

CHEMILUMINESCENCE
- The creation and emission of light through a CHEMICAL REACTION.
- Often has LITTLE TO NO HEAT.
(ex) Glow sticks