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Test Review #2

Study guide for test on light and sound

Sound waves are like what toy you can play with and why? A slinky, because of compressions (tightly) and rarefactions (loosely) packed particles.
Which is faster, light or sound waves? Light waves are faster which we see and hear with lightning and thunder.
What are waves? Waves are disturbances that transfers energy from place to place.
How do we see? Light source-->object-->our eyes-->brain
What is wavelength? Measure wavelength from crest to crest or point to point..
Why does a red flower look red? The flower absorbs all the colors except red which is reflected to the eye.
What did all of our homemade instruments produce? They all produced sound or vibrations.
How did students get their rubber bands on their instruments to play higher pitches? They pulled them tighter and closer together.
What does amplitude control? It is the amount of energy in a wave and controls how loud or soft the sound is.
What is reflection? A wave hits an object and bounces back.
What is refraction? It is when a wave is bent, changes direction.
What causes the pupil to expand or contract? More light causes contraction and less light causes expansion
What is visible light? the colors of the rainbow which have different wavelengths
How do we hear? Outer ear-->middle ear-->inner ear-->brain
What kind of waves are light waves? They are transverse waves like a roller coaster.
What is pitch? how high or low a sound is
What is speed? It is the rate at which a wave passes through a medium.
What is frequency? It is the number of vibrations per unit of time.
Sound moves the fastest in which medium? Steel
How is deafness caused? damage to the cochlea, inner ear
Created by: jtirby