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?

Ear we go!

Doppler Effect

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-814 Why do we see color? When our eyes see different wavelengths of light in the visible spectrum, we see colors.

NSF North Mississippi GK-815 What 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 light Only red light is reflected

NSF North Mississippi GK-816 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-817 What about an outfit? Shorts look blue Shirt looks red White light

NSF North Mississippi GK-818 Black When 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-820 The Electromagnetic Spectrum Different wavelengths of EM waves. These wavelengths of light and others make up a spectrum.

NSF North Mississippi GK-821 On the Spectrum… Left SideRight Side Type of Wave Wavelength Frequency Energy

NSF North Mississippi GK-822 VISIBLE LIGHT Electromagnetic waves we can see.

NSF North Mississippi GK-823 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

NSF North Mississippi GK-824 How can I remember the seven colors of the visible spectrum? ROY G BIVROY G BIVROY G BIVROY G BIV EDED RANGERANGE ELLOWELLOW REENREEN LUELUE NDIGONDIGO IOLETIOLET

NSF North Mississippi GK-825 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-826 Colour We can demonstrate this by splitting white light with a prism: This is how rainbows are formed: sunlight is “split up” by raindrops.