Loud sounds can damage the eardrum and cause ________
deafness
100
Which is not part of the ear: stirrup, hammer, wrench, anvil
wrench
100
What is the first step for sound waves to travel to your brain?
outer ear captures the sound
200
the bouncing of a sound wave
reflection
200
unit for measuring loudness
decibel
200
A vibration that spreads away from a vibrating object is a ___________
sound wave
200
How fast sound travels depends on
how close the molecules are to each other and how they collide with each other
200
What is the second step for sound waves to travel to your brain?
vibrates the eardrum
300
part of a sound wave where molecules are crowded together
compression
300
part of a sound wave where molecules are spread apart
rarefaction
300
Blank recording tapes are coated with scrambled ___________ particles
magnetic
300
To hear an echo you must have this
a good reflective surface
300
What is the third step for sound waves to travel to the brain?
3 bones vibrate the middle ear
400
What is the definition of absorption?
Disappearance of a sound wave into a surface.
400
What is the definition of frequency?
Number of times an object vibrates per second.
400
_____________ uses sound waves to detect faraway objects
sonar
400
Sound travels about 1,500 meters per second through the water. A sonar signal is timed at 6 seconds from the time it is sent to the time it returns. How deep is the ocean at this point?
4500 m
400
What is the fourth step for sound waves to travel to your brain?
fluid in the inner ear vibrates
500
What is the definition of hertz?
unit for measuring frequency
500
What is the definition of pitch?
how high or how low a sound is
500
Scientists use an ______________ to picture sound waves and compare them.
Oscilloscope
500
Sound travels about 1,500 meters per second through the water. A sonar signal is timed at 12 seconds from the time it is sent to the time it returns. How deep is the ocean at this point?
9,000 m
500
What are the fifth and sixth steps for sound waves to travel to your brain?
auditory nerve travels to your brain and your brain tells you what the sound is