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Unit 6: Sound Page 8

Objectives

Lesson 1: Sound Wave Vibrations

Sound is a fascinating form of · Particles in a wave are
energy. As you sit there reading moving a distance against a
this, there is energy flowing all force. They are having work
around you in the form of light done on them and they can

waves, sound waves, radio waves, do work.
heat and more. You are constantly
· A transverse wave is a wave
being bombarded by energy.
where the particle moves
Moving by waves at amazing perpendicular to the medium.
speeds, sound energy brings you
· A longitudinal wave is where
knowledge about the world around
the particle moves parallel to
you. Does a tree make a sound if it
the medium.
falls without anyone there to hear
· The wavelength is the
it? This section will answer that
distance between two like
question and many others.
parts of the wave.
Highlights:
· Amplitude is the height of the
· Energy moves by waves.
wave.
· All waves begin as vibrating
· Energy is all around us all
particles.
the time.
· The particles vibrate back
· Antennae are necessary to
and forth. They do not move
pick up energy.
along the wave.
· Our bodies have three
· Frequency is the amount of
antennae; eyes, ears, and
vibrations there are in a
skin.
given amount of time.
· Eyes can detect light waves,
· Hertz is a measurement of
which are a small portion of
frequency and is one
the electromagnetic
vibration per second.
spectrum.
· Waves are the way energy
· Skin can detect heat, which
moves from place to place.
is another even smaller
Waves are energy-mobiles.

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