1. Light Vocabulary
6th Grade Science

2. Visible Light The wave energy we can see Made of many colors
Light waves travel in straight lines

3. Radiant Energy Energy given off by the sun Travels in waves
Another name for light energy

4. Absorb
When light waves enter a substance and change into other forms of energy.
Darker colors absorb more light

5. Reflect
When light waves bounce off something else

6. Media Clip: Reflection

7. Refract When light waves bend
Light waves are refracted as they pass through water.

8. Spectrum
White light is made of all the colors of the rainbow.

9. ROY G BIV The colors of the rainbow
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Red has the longest wavelengths
(bent the least)
Violet has the shortest wavelengths (bent the most)

10. Prism
A piece of glass or plastic that bends light waves

11. Media Clip: Refraction

12. Opaque An object that does not allow light waves to pass through it
You cannot see through these objects

13. Translucent An object that allows a few light waves to pass through it
You can almost see through these objects.

14. Transparent An object that allows light waves to pass through
You can see through these objects

15. Media Clip: Translucent, Transparent, Opaque

16. Let’s Review
Video Clip Review
Pay attention to how we see color

17. The Human Eye
6th Grade Science

18. Parts of the Eye Lens Eyelid Sclera Eyelashes Orbital Muscles Iris
Cornea
Optic Nerve
Pupil
Eye Socket

19. Cornea
Clear covering over the eye

20. Iris Circular band that controls how much light enters the eye
Gives eyes their color
Examine your partner’s eyes with the lights off and then with the lights on.
What do you notice?

21. Lens
Tissue that bends (refracts) light passing through and helps focus an image

22. Pupil Hole in the center of the eye which allows light to pass through
Why do optometrist dilate your eyes?

23. Sclera
White part of the eye
Protects the eye

24. Retina
Layer of tissue on the back of the eye that has cone and rod cells which gather information
Rods: allow us to see black, white, & shades of grey
Cones: allow us to see red, blue, and green colors
They work together so we can see many shades of colors

25. Optic Nerve
Nerve that connects the eye to the brain

26. Eyelid & Eyelashes
Covers & protects the eye

27. Orbital Muscles Allow eyes to move
Humans are the only animal who can “roll” their eyes

28. Media Clip

29. How do we see? 1. Light enters the eye through the cornea.
2. Light continues through the pupil which is controlled by the iris.
3. Light passes through the lens which refracts (bends) the light causing the picture to be upside down.
4. The upside down picture travels to the retina which flips the image right side up.
5. The optic nerve sends signals to the brain, which interprets the images.

30. Eye Fun Facts
Most people blink every 2-10 seconds.Each time you blink, you shut your eyes for 0.3 seconds, which means your eyes are closed at least 30 minutes a day just from blinking.
Owls can see a mouse moving over 150 feet away with light no brighter than a candle.
The reason cat's and dog's (and cow’s) eyes glow at night is because of silver mirrors in the back of their eyes called the tapetum. This makes it easier for them to see at night.
An ostrich has eyes that are two inches across. Each eye weighs more than their brain.
A chameleon's eyes can look in opposite directions at the same time.
A newborn baby sees the world upside down because it takes some time for the baby's brain to learn to turn the picture right-side up.
One in every twelve males is color blind