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Test Review #2
Study guide for test on light and sound
Question | Answer |
---|---|
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 |