Sound Vocabulary
The height of the wave is called the ______________?
Amplitude
A vibration is passed from molecule to molecule to create _________________
A sound wave
What are the main elements in the sun?
Hydrogen and Helium
Name an object that is transparent
Does infrared light have a longer wavelength or shorter wavelength than the visible spectrum?
Longer
The distance between waves (crest to crest OR trough to trough) is called ______________?
Frequency
What are three things that create sonic booms?
bullwhips, bullets, fighter jets
What does "radiate" mean?
To spread out in all directions from the center
Name something that is translucent
wax paper, frosted glass, stained glass window
Which color light has a higher frequency- yellow or blue?
blue
Explain how an echo works
A sound wave bounces off something and returns to the person's ear for a second time
What is the best conductor of sound...solid, liquid, or gas? Why?
Solid because the molecules are more tightly packed together
What does incandescent mean?
Hot enough to glow
What does opaque mean?
No light can pass through an object
If you mix all the colors of light together, what do you get?
White light
What is timbre?
The quality of sound (pleasant or unpleasant sounding)
Why is there no sound in space?
Because there is no air...no molecules to pass the sound wave/vibration
Where are places LED lights are used?
televisions, traffic lights, digital clocks, remotes, watches, appliances,
Explain how a shadow is formed
When light hits an opaque object, some passes around the object and other light is blocked. The blocked light creates a shadow
Name two things ultraviolet light can do
cause sun tan or sunburn, kill bacteria, purify medical equipment or water, used on important documents to prevent forgery
List three application of sound in technology
Sonar- fish finders, ocean mapping, finding oil reservoirs, ships scanning for submarines
Ultrasound- for pregnancy and medical
Bioacoustics- identifying wildlife sounds and using them
Explain why a sonic boom happens
The object is going faster than the speed of sound and the sound waves cannot be passed quickly enough and build up, combining into one giant shock wave
Explain how nuclear fusion happens in the sun
Hydrogen atoms fuse together to become helium atoms, releasing energy and causing an explosion
Explain how light acts as both a wave and a beam
Straight lines of light are called beams and are made up of little particles called photons.
Light also acts as a wave and vibrates electrical fields which the vibrate magnetic fields.
heat-seeking missiles, search and rescue/infrared scopes, night vision goggles, weather satellites, art forgeries