Transcript What is a wave?

You are to create as many waves as possible
without using your hands. You can use various
items at your desk to create a wave but remember
you can’t use your hands.
Let’s talk about your observation!
There are two types of
energy, kinetic and
potential, and it comes
in many forms:
Sound- kinetic
 Thermal-kinetic
 Chemical-potential
 Electrical- kinetic
 Radiant/ Light-kinetic
 Mechanical- kinetic

Potential- when
matter has stored energy
that is ready to be used
but is not being used.
Kinetic-the release
of potential energy;
matter
in motion
A wave is the ability to move
or cause change in matter.
A disturbance that transfers energy. Some types of
waves require a medium (solid, liquid, or gas) to
travel through while others do not.
A medium is a substance or material that carries a
wave (solid, liquid, gas)

A medium is a
substance or
material that
carries a wave
(solid, liquid,
gas)
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Mechanical Wave
Electromagnetic
Wave
Transverse Wave
Longitudinal Wave

Mechanical Waves
travel through matter
Sound waves
 water waves

Electromagnetic Waves
 travel through empty
space, as well as through
matter
Visible light,
 microwaves,
 X-rays, and
 radio waves


Object in motion
will keep
moving at the
same speed and
in the same
direction unless
force change
their motion






Require a type of matter
to travel through
Medium- (solid, liquid,
gas)
These waves pass on
energy
Waves can create sound
Sound can travel through
air, water, or solids
Can not travel through a
vacuum( no air)




Waves that can travel
through a vacuum
Empty Space
They do not need a
medium or matter
Examples:



Light wave
Radio waves
X-rays
Waves
Activity
#1
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

Since waves are usually
unseen, we are going to make
these waves ourselves using
Slinkys.
Are we creating mechanical
waves or electromagnetic
waves? Explain your
reasoning.
What did you observe?



The wave is moving
left to right, while the
disturbance moves up
and down
The disturbance
moves perpendicular
to the direction of the
wave
Transverse waves
create light
The peak, or highest point of a transverse wave.
The valley, or lowest point, of a transverse wave.
The distance from any point on one wave to a
corresponding point on an adjacent wave.
(ex. Crest to crest or trough to trough)
Tie a rope to the a chair and create long and short
wavelengths.
Question:
1.
What do you notice about the frequency?
2.
What happens when you move it very fast, in an
up and down movement?
3.
What happens when you move it slowly in an up
and down movement?
4.
Does frequency increase or decrease when
wavelength is reduced?
The number of oscillations produced in a certain
amount of time. The greater the number of
oscillations per second, the higher the frequency.
The higher the frequency, the more energy carried
by the wave.
High Energy
Low Energy

How do you know?

How do you know?
Transverse waves produce light
Longitudinal waves produce sound



The disturbance
moves in the same
direction as the wave
These waves create
sound
Examples:


Sound waves
Waves moving
through a stretched
out slinky or spring
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
Directions
With the slinky, create
transverse wave with
your group.
Now create a
longitudinal wave
with your group
Complete in Notebook
Compare and Contrast
the two waves you
created with your group.
Record your observations:
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See
Hear
Feel
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Earthquakes develop
in the crust of the
earth.
The inner part of the
earth contains
massive energy.
Some of the energy
escapes through
cracks within the
earth’s surface.

Waves are what cause
us to experience
earthquakes
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Seismic wave is an
elastic wave generated
by an impulse such as
an earthquake or an
explosion

P-Waves:
Also called
compressional wave
 Is seismic body wave
that shakes the groud
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S-Waves:
Also called shear wave
 Is a seismic body wave
that shakes the ground
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L-Waves: