the ear. 1. the outer ear collects sound waves. 2. the sound waves make the eardrum vibrate
TRANSCRIPT
The Ear
1. The outer ear collects sound waves.
2. The sound waves make the eardrum vibrate.
3. The eardrum causes 3 tiny bones to vibrate. (hammer, anvil, stirrup)
4. The tiny bones make the fluid in the cochlea vibrate.
5. This causes tiny hair cells to vibrate (in cochlea).
6. Vibrations are passed to the auditory nerve which leads to the brain.
7. The brain interprets sound!
What did one ear say to the other ear before they went over the waterfall?
What did one ear say to the other ear before they went over the waterfall?
Ear we go!
Doppler Effect
Eye and Light
How we see.1. Light passes through the transparent cornea.2. The light that passes through the opening of the pupil, the amount of light is controlled by the iris
contracting and releasing.3. The light is reflected through the lens and the image is projected upside down on the retina.4. The cones on the retina respond to different frequencies of light (colors)5. The optic nerve transmits information to the brain.6. The brain interprets the information from the optic nerve and you see the world around you.
NSF North Mississippi GK-8 14
Why do we see color?When our eyes see different
wavelengths of light in the visible spectrum, we see colors.
http://www.astronomynotes.com/light/colorswvl.gif
NSF North Mississippi GK-8 15
Seeing colorWhat we actually see is the light an object reflects or in some cases the light an object produces. For example, a red book only reflects red light:
White
lightOnly red light is
reflected
NSF North Mississippi GK-8 16
A white hat would reflect all seven colours:
A pair of purple pants would reflect purple light(and red and blue, as purple is made up of red and blue):
Purple light
White
light
NSF North Mississippi GK-8 17
Using coloured light
What about an outfit?
Shorts look blue
Shirt looks red
White
light
NSF North Mississippi GK-8 18
BlackWhen you see black, all of the wavelengths of light are absorbed and no light is reflected back at you.
White
light
Nothing is reflected.
All visible light is absorbed.
NSF North Mississippi GK-8 20
The Electromagnetic Spectrum
• Different wavelengths of EM waves.
• These
wavelengths of light and others make up a spectrum.
NSF North Mississippi GK-8 21
On the Spectrum…
Left Side Right Side
Type of Wave
Wavelength
Frequency
Energy
NSF North Mississippi GK-8 22
VISIBLE LIGHT
Electromagnetic waves we can see.
NSF North Mississippi GK-8 23
Visible Spectrum• The visible
spectrum contains seven colors.
• Each of these colors corresponds with a particular wavelength.– Longest
wavelength= red light
– Shortest wavelength= violet (purple) light
http://ldt.stanford.edu/ldt1999/Students/tita/mjrproj/color/wavereview.html
NSF North Mississippi GK-8 24
How can I remember the seven colors of the visible
spectrum?
ROY G BIVED
RANGE
ELLOW
REEN
LUE
NDIGO
IOLET
NSF North Mississippi GK-8 25
White Light• White light is not a single color; it is
made up of a mixture of the seven colors of the rainbow.
NSF North Mississippi GK-8 26
ColourWe can demonstrate this by splitting white light with a prism:• This is how rainbows are formed: sunlight is “split up” by raindrops.