Petroleum, natural gas, and coal
Type of fossil fuel that forms from the remains of fernlike plants
Devices that use semiconductors to produce electricity from solar energy
Electricity produced by falling water
It can disturb natural ecosystems
A disadvantage of using hydroelectricity is
Is an example of a nonrenewable source of energy
A wave will travel only as long as it has ______ to carry
When you squeeze together the coils of a spring and than release them, you are creating a __________ wave
Transverse and Compressional
Water waves are _________________
Wave A carries more energy than wave B. Wave B has a smaller what than wave A?
The energy a wave carries is measured by its what?
For a given wave, if the frequency doubles, the wavelength is what?
When light is reflected from a surface, as the angle of incidence increases, the angle of reflection does what?
Sound travels in what type of wave?
The speed of sound in what is greater than the speed of sound in water?
The way your brain interprets the instensity of a sound is the what?
A sound intensity above ____ may cause permanent hearing damage
The listener must be moving
For the doppler effect to occur what must happen?
A combination of sounds with distinct pitch and specific pattern is what?
Reverberation in concert halls is caused by what of sound?
Bats use what to navigate and find prey?
A system of using the reflection of underwater sound waves is called what?
Reflection of light waves from a smooth surface is what?
Magenta, Cyan, and Yellow
The primary pigment colors are what?
What color is produced by blending the three primary pigments?
They use less energy
Fluorescent lightbulbs _______ than incandescent lights
Red, Blue, and Green
What are the primary light colors?
What color is produced by blending the three primary colors of light?
Light of one wavelength that travels with its crests and troughs aligned is what?
Total internal reflection
Optical fibers rely on what for their efficiency?
Lasers can be a part of all the following except a what?
Any smooth surface that reflects light to form an image is a what?
Light rays that hit a convex mirror do what as they are reflected?
What are thick in the middle and thin at the edges?
Virtual and Inverted
The image formed by a plane mirror is what?
Light is refracted and spread out by a what?
What uses a lens and two mirrors?
A tuning fork starts to vibrate when a certain note is played on the piano. This is an example of what?
The bowl of a shiny spoon forms an enlarged, upright image similar to that of what kind of mirror?
Outside rear-view mirrors on automobiles are generally what type of mirror?
When an object is ____ focal lengths away from the lens, the image is no longer real