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Waves

8th grade science

QuestionAnswer
The material or substance through which a wave may travel is called the ____________. medium
Sound waves travel by ___________ of particles. vibration
Waves that require a medium are called ______________ waves. mechanical waves
Waves that do not require a medium are ___________________ waves. electromagnetic waves
Sound travels faster in a solid than a liquid or a gas. That is because the denser or more concentrated the medium, the ____________ sound will travel. faster
A transverse wave that does not require a medium is called an ____________________ wave. electromagnetic wave
___________ waves are waves in which the particles of the medium vibrates in an up and down motion. transverse
Particles of a transverse wave move _________________ to the direction that the wave is traveling. perpendicular
The _________ is the highest point of a transverse wave. crest, the top of the wave
The _________ is the lowest point of a transverse wave. trough, the bottom of the wave
The ___________ of a wave is the maximum distance of the wave vibration from its rest position to the crest. amplitude
The _________ position of a wave is where the particles of a medium stay when there are no disturbances. rest
The larger the amplitude, the greater the ___________ of the wave. energy
_______________ is the distance between two adjacent crests or compressions in a wave. wave length
______________ is the number of waves produced in a given amount of time. frequency
Frequency is expressed in ____________ (Hz). hertz (still Hz)
Higher frequency, just like higher amplitude, means more ______________. more energy
Sound waves travel fastest in _____________ and slowest in air. solids
The __________ of a sound wave is directly related to the frequency. pitch
A dog whistle has a _____________ frequency. high
_____________ waves are waves in which the particles of the medium vibrate back and forth along the path that the wave travels. longitudinal waves
A _____________ is a section of longitudinal wave where the particles are crowded together. compression
A _____________ is a section of the wave where particles are less crowded. rarefaction
_________ waves are longitudinal waves. sound
List the seven types of electromagnetic waves in the electromagnetic spectrum - from lowest frequency to highest frequency. radio, microwave, infrared, visible-light, ultraviolet, x-ray, gamma
_____________ occurs when a wave bounces back after striking a barrier. reflection
Reflected sound waves are called an _______. echo
Light travels at different speeds in different materials. This is why light ___________, or bends as it enters a new substance. refracts
The surface of a red apple __________ all the colored light rays, except for red. asorbs
The red light from an apple is _____________ to the eye. reflected to the eye
___________ is the bending of waves around a barrier or through an opening. defraction
___________ waves travel around corners better because it has larger wavelengths than light. sound
____________ is when light is taken in by an object. absorption
A lens that is thicker in the middle is called a ____________ lens. convex
A lens that is thinner in the middle is called a ____________ lens. concave
A convex lens bends light ____________. inward
A wave is any disturbance that transmits ___________ through matter or space. energy