Show:
Simple Machines
Sound
Sound 2
Light
Miscellaneous
100
Device that makes work easier
a machine
100
What is a medium?
material through which mechanical waves can travel. Example: Air
100
Sense organ that can detect sound.
Ear
100
What are the 7 colors that make up the visual spectrum?
red, orange, yellow, green, blue, indigo, violet.
100
Rope wrapped around a fixed wheel
Pulley
200
What is a Fulcrum?
Fixed point around which a lever pivots or turns
200
What is supersonic?
Anything faster than the speed of sound.
200
A high pitched sound will have a _________ frequency.
high
200
What is a light beam made of?
Photons
200
What is the ration of work output to work input?
Efficiency
300
What is a rope wrapped around a wheel?
Pulley
300
What is the unit used to measure the intensity or loudness of a sound?
Decibel
300
What are the three main parts of the human ear?
Outer, middle, inner ear.
300
What is an illuminated object? Give an example.
Object that reflects light, Moon
300
The distance from the top of one wave to the top of the top of the next is called?
amplitude
400
What are the 6 simple machines?
Lever, pulley, screw, inclined plane, wheel and axle, wedge.
400
What is any sound lower than 20 hertz frequency called?
ultrasonic
400
Jets that fly faster than the speed of sound create a ________
Sonic boom
400
What are the 4 properties of light waves?
speed, wavelength, frequency, amplitude.
400
Sense organ in humans that detects light.
eye
500
What is the difference between work output and work input?
work output - work done by a machine. work input - work done on a machine.
500
Explain how a train whistle illustrates Doppler Effect.
Answers will vary
500
What 2 things does a sound wave consist of?
compressions and rarefactions
500
What is the difference between convex and concave mirrors?
convex - mirror that curves outward. Concave - mirror that curves inward.
500
What 3 main groups can musical instruments be divided into?
percussion, string, wind.