EM Spectrum
True or False. An Electromagnetic wave (light) travels fastest in a gas or a vacuum.
True
Sound travels fastest in a _______ (solid, liquid, gas)
SOLID
Increasing the amplitude of a sound wave does what to the volume?
increases, makes louder
What does ROYGBIV stand for?
Red, Orange, Yellow Green, Blue, Indigo, Violet.
How is the energy on the EM spectrum organized? (radio to gamma) From ______ to ______
longest wavelength to shortest; from lowest energy to highest energy
How does sonar detect an object in water?
A- by sending sound waves that reflect off the object
B- by sending sound waves that are absorbed
C- by sending sound waves to detect the composition
A- by sending sound waves that reflect off the object
When a wave hits an object and then bounces back it is ________________.
reflected
When heat is transferred by Electromagnetic Waves
Radiation
The only part of the EM spectrum we see is _______________.
Visible Light
True or False. Visible light has a frequency approximately the size of baseball.
False. It is about the size of a bacteria.
What causes sound to travel?
Vibration of molecules
In which type of wave do the waves move perpendicular to the movement of energy?
Transverse waves
Why are power line workers' gloves made of rubber?
A- rubber conducts heat
B- rubber conducts electricity
C- rubber does not conduct electricity
C- rubber does not conduct heat
Why are humans unable to hear x ray waves?
A- they don't cause matter to vibrate to produce sound
B- they have a higher frequency than humans can hear
C- they have a larger amplitude than humans can hear
A- they don't cause matter to vibrate to produce sound
What about white light is true?
A- it is a combination of all wavelengths or colors
B- it is a combination of red and blue
C- it has no EM energy
A- it is a combination of all wavelengths or colors
Why can't sound travel in space or a vacuum?
Sound must have matter/medium to move through
When a wave changes speeds and direction as it moves from one medium to another ______________.
refraction
When heat is transferred by the differences in density within a medium. (hot rises, cold sinks)
convection
Physical expression of gene. (i.e. the actual physical trait observed, like blue eyes)
Phenotype
The number of wavelengths passing by a fixed point in one second is?
Frequency
What does high frequency mean for a waves energy and wavelength?
Short wavelength
High energy
What do we call the HEIGHT of a wave?
Amplitude
273 on the Kelvin scale is equal to what in degrees Celsius?
0 degrees Celsius
How many Chromosomes do humans have?
46 or 23 pairs