Download Chapter 5, Section 2

Chapter 5, Section 2
Making Waves
February 10, 2014
HW: PTG #1, 2, 5-8, pg. 505-506, Due Next
Wednesday/Thursday
• Learning Objective:
– Describe how waves carry
energy
– Describe how wavelength,
frequency and speed of a wave
are related
• Success Criteria:
– Observe the motion of a pulse
– Calculate the speed of a wave
pulse
– Observe standing waves
– Investigate the relationship
among wave speed,
wavelength, and frequency
– Make a model of wave motion
– Distinguish between transverse
and longitudinal waves
• Do Now:
–Write LO and
SC on a new
left-side page
–WDYS/WDYT
pg. 492
WDYS? WDYT?
• T-chart
February 10, 2014
HW: PTG #1, 2, 5-8, pg. 505-506, Due Next
Wednesday/Thursday
•
Learning Objective:
– Describe how waves carry energy
– Describe how wavelength,
frequency and speed of a wave are
related
•
Success Criteria:
Observe the motion of a pulse
Calculate the speed of a wave pulse
Observe standing waves
Investigate the relationship among
wave speed, wavelength, and
frequency
– Make a model of wave motion
– Distinguish between transverse and
longitudinal waves
–
–
–
–
• Do Now:
– Grab physics
books (pg. 492)
– Take out your
notebooks and
quietly review
the WDYS?
WDYT? That was
completed last
class.
Investigate: Part A
• Stadium Wave
• Standing Wave
• Investigation 5.2 Making Waves handout
Part A Big Idea Summary
Answer the following on a half sheet of paper by
writing down the entire sentence frame and
answering in complete sentences
• 1. The wave moves _____________, but people
move _________ and __________.
• 2. Waves are produced by neighboring
___________ moving up and down, causing the
wave to move ___________.
• 3. Which learning objective do your answers
directly relate with?
Investigate: Part B
• Transverse Waves
• Demo #1-2 (answer questions) demo 3-4
answer question
• #6-7-in groups
• #7-choose amplitude as a class
– Prediction: How do you think amplitude will
affect the speed of the wave?
– Groups 1-2, 3-4, 5-6 different amplitudes
Exit ticket
• Turn in Investigation 5.2 Making Waves
handout
February 13, 2014
HW: PTG #1, 2, 5-8, pg. 505-506, Due Fri
• Learning Objective:
– Describe how waves carry
energy
– Describe how wavelength,
frequency and speed of a wave
are related
• Success Criteria:
– Observe the motion of a pulse
– Calculate the speed of a wave
pulse
– Observe standing waves
– Investigate the relationship
among wave speed,
wavelength, and frequency
– Make a model of wave motion
– Distinguish between transverse
and longitudinal waves
• Do Now:
– How would you know if you
were observing a transverse
wave?
February 12/13, 2014
HW: PTG #1, 2, 5-8, pg. 505-506, Due Fri
• Learning Objective:
– Describe how waves carry
energy
– Describe how wavelength,
frequency and speed of a wave
are related
• Success Criteria:
– Observe the motion of a pulse
– Calculate the speed of a wave
pulse
– Observe standing waves
– Investigate the relationship
among wave speed,
wavelength, and frequency
– Make a model of wave motion
– Distinguish between transverse
and longitudinal waves
• Do Now:
– Once bell rings it
needs to be quiet and
people seated in their
assigned seats with a
text book
– Read procedures #1013, pgs 495-6,
SILENTLY!!
– You will be getting a
work habits grade
today based off of
following directions
and remaining on task
• #10-13 Demo then in groups
• #14-Demo, discuss energy
• #15-groups, discuss
a. A transverse pulse is one in which the motion
of the wave is perpendicular (90 degrees) to
the motion of the particles of the medium
b. As the amplitude of a transverse pulse on a
spring increases, its speed remains the same
c. As the frequency of a standing wave increases,
the wavelength decreases and the wave
velocity remains the same.
January 11, 2011
HW: PTG #1, 2, 5-8, pg. 505-506, Due Wed,
Bring Tissues
• Learning Objective:
– Describe how waves carry
energy
– Describe how wavelength,
frequency and speed of a wave
are related
• Success Criteria:
– Observe the motion of a pulse
– Calculate the speed of a wave
pulse
– Observe standing waves
– Investigate the relationship
among wave speed,
wavelength, and frequency
– Make a model of wave motion
– Distinguish between transverse
and longitudinal waves
• Do Now:
– LO and SC reflection
• Go through what we
have covered so far
and write page #s next
to each item
• How do you know you
have met this success
criteria or learning
objective? On left side
page
Part B Big Ideas
• Transverse Wave:
• Standing Wave:
• Speed of a
wave=distance/time
• Speed=frequency x
wavelength
• Frequency=#times
the wave moves up
and down each
second
• Energy travels in
waves
Investigate: Part C
• Longitudinal Waves
• Complete all sections, OK with teacher
Part C Big Ideas
• Compressional/Longitudinal Waves
Investigate: Part D
• Skip
February 14, 2011
HW: PTG #1, 2, 5-8, pg. 505-506, Due Tues
• Learning Objective:
– Describe how waves carry
energy
– Describe how wavelength,
frequency and speed of a wave
are related
• Success Criteria:
– Observe the motion of a pulse
– Calculate the speed of a wave
pulse
– Observe standing waves
– Investigate the relationship
among wave speed,
wavelength, and frequency
– Make a model of wave motion
– Distinguish between transverse
and longitudinal waves
• Do Now:
– Describe how wavelength,
frequency, and speed of a
wave are related.
– Suppose you shake a long,
coiled spring back and
forth. Then you shake it
rapidly.
• Describe how the waves
change as you shake the
coiled spring more
rapidly.
• What wave characteristics
(amplitude, wavelength,
frequency, and speed)
change?
• What wave characteristics
did not change?
Physics Talk: Vocab Sheet
• Waves Transfer Energy
• A wave transfers
energy with no transfer
of mass
• Example
• When you throw a ball
the mass and kinetic
energy move from one
place to another
• A wave transfers only
energy, no mass is
moving.
Physics Talk: 2 column notes
• How is energy
transferred?
• Chemical energy in
musclesmechanical
energy in
armkinetic energy
in spring
• Energy transferred
from one form to
another, but TOTAL
energy remains the
same…Conservation
of Energy!
Physics Talk: 2 Column notes
• How do waves “add”?
• They continue to travel
as though the other
wave never existed.
• http://www.youtube.c
om/watch?v=Xqo6sEt1c
UE
• ·
A
B
• What will this look like
when the pulses meet?
• After that meet?
Physics Talk: Vocab Sheet
• Periodic Wave
• Crest
• Trough
• Amplitude
• Repetitive series of
pulses
• Highest point on a
periodic wave
• Lowest point on a
periodic wave
• Height of crest or
depth of trough
Physics Talk: 2 Column Notes
• How does amplitude
relate to sound?
• Large amplitudeLoud
sound!
• Small amplitudesoft
sound
• How does amplitude
relate to energy?
• Large
amplitudeLarge
amount of energy
• Small amplitudesmall
amount of energy
Physics Talk: Vocab Sheet
• Wavelength (λ)
• Frequency (f)
• Distance between
two consecutive
crests or troughs
• Symbol is λ
(pronounce lambda)
• Number of waves per
unit time
• Usually waves/sec
called hertz (Hz)
Wavelength Practice
• In the diagram below, what is the
wavelength of this standing wave?
•
12m
Physics Talk: Vocab Sheet
• Period (T)
• Time required to
complete one
complete wave
(crest-trough-crest)
• Period and frequency
are inversely
proportionate
• T=1/f
• f=1/T
Period Practice
• What is the period if 8 waves are
produced each second?
• What is the period if 5 waves are
produced in 10 seconds?
Physics Talk: Vocab Sheet
• Transverse Waves
• Compressional
(Longitudinal) Wave
• The medium moves
perpendicular to the
direction of the wave
• The medium moves
parallel to the
direction of the wave
• http://www.youtube.c
om/watch?v=MoVz2ENJ
b8M
Physics Talk: Vocab Sheet
• Standing Wave
• Wave pattern that
remains in a constant
position.
• Does not go
right/left, but does
go up/down.
• http://www.youtube.
com/watch?v=03cUrk
jqdE0
Physics Talk: 2 Column notes
• What type of wave is
sound?
• Compression Wave
• Air molecules get
compressed and
move through the air
Physics Talk: 2 column notes
• How can you
calculate the speed
of a wave?
• Speed=Distance/Time
• Wave speed=wave
frequency x
wavelength
v=fλ
Sample problems on pg.
502
January 12, 2011
HW: Finish Vocab Boxes
• Learning Objective:
– Describe how waves carry
energy
– Describe how wavelength,
frequency and speed of a wave
are related
• Success Criteria:
– Observe the motion of a pulse
– Calculate the speed of a wave
pulse
– Observe standing waves
– Investigate the relationship
among wave speed,
wavelength, and frequency
– Make a model of wave motion
– Distinguish between transverse
and longitudinal waves
• Do Now:
– Finish LO and SC reflection
• Go through what we
have covered so far
and write page #s next
to each item
• How do you know you
have met this success
criteria or learning
objective? On left side
page
– Essential Questions Pg. 504
• What does it mean?
• How do you know?
• Why should you care?
Essential Questions
• Pg. 504
– What does it mean?
– How do you know?
– Why should you care?
Vocabulary Activity
Book Definition:
Definition in YOUR words
Example
Picture or Equation
HW: PTG #1, 2, 5-8, pg. 505-506