Matter and Waves
Presentation
•
Science
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6th - 8th Grade
•
Hard
Joseph Anderson
FREE Resource
12 Slides • 10 Questions
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Waves
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Multiple Choice
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1. Mechanical Waves
a. ) Transverse: particles move perpendicular (+) to the direction the wave travels.
Ex: ocean waves
b.) Longitudinal (compressional): particles move parallel (=) to the direction the wave travels.
Ex: sound waves
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Multiple Choice
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Multiple Choice
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2.) Electromagnetic (EM) Waves
A waves that does NOT require a medium (matter to travel), has an electric field component and a magnetic field component.
Travels at the speed of light 3.0 x 108 m/s in a vacuum.
Ex: Radio waves, Microwaves, Infrared, Visible Light, Ultraviolet,
X-rays, and Gamma Rays
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Multiple Select
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Characteristics
Crest: highest point of a wave
Trough: lowest point of a wave
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Multiple Choice
Which letter is represents the crest?
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Characteristics continued...
Longitudinal waves
Compression: region where particles are closest together
Rarefaction: region where particles are farthest apart
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Characteristics continued...
Wavelength (λ): the distance from any point on a wave to an identical point on the next wave.
Amplitude: the distance the particles in a medium move away from their resting position.
HIGHER AMPLITUDE = HIGHER ENERGY
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Multiple Choice
Which letter is represents amplitude?
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Open Ended
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Multiple Select
Which points represent one wavelength? Select all that apply.
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Characteristics continued...
Period (T): The time required for one wavelength.
Frequency (f): The number of cycles in a given amount of time (usually 1 second). Measured in Hertz (Hz).
HIGHER FREQUENCY = HIGHER ENERGY
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Frequency and Wavelength Relationship
Frequency and wavelength are INVERSELY related....
low frequency = long wavelength
high frequency = short wavelength
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Multiple Choice
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Multiple Choice
Waves
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